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Issued During Period, Value, Employee Stock Purchase Plan","description":"Aggregate change in value for stock issued during the period as a result of employee stock purchase 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Includes shares issued in an initial public offering or a secondary public 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Period, Value, Stock Options Exercised","description":"Value of stock issued as a result of the exercise of stock 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Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.","units":{"USD":[{"end":"2017-12-31","val":8843000,"accn":"0001144204-18-012722","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-05"},{"end":"2017-12-31","val":8843000,"accn":"0001144204-18-025554","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-07"},{"end":"2017-12-31","val":8843000,"accn":"0001144204-18-041264","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-01"},{"end":"2017-12-31","val":8843000,"accn":"0001144204-18-056361","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-10-31"},{"end":"2017-12-31","val":8843000,"accn":"0001144204-19-012700","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-07","frame":"CY2017Q4I"},{"end":"2018-03-31","val":8843000,"accn":"0001144204-18-025554","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-07","frame":"CY2018Q1I"}]}},"TemporaryEquityLiquidationPreference":{"label":"Temporary Equity, Liquidation Preference","description":"The aggregate liquidation preference (or restrictions) of stock classified as temporary equity that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.","units":{"USD":[{"end":"2016-12-31","val":9500000,"accn":"0001144204-18-012722","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-05","frame":"CY2016Q4I"},{"end":"2017-12-31","val":9500000,"accn":"0001144204-18-012722","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-05"},{"end":"2017-12-31","val":9500000,"accn":"0001144204-18-025554","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-07","frame":"CY2017Q4I"},{"end":"2018-03-31","val":9500000,"accn":"0001144204-18-025554","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-07","frame":"CY2018Q1I"}]}},"TemporaryEquityParOrStatedValuePerShare":{"label":"Temporary Equity, Par or Stated Value Per Share","description":"Per share amount of par value or stated value of stock classified as temporary equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable.","units":{"USD/shares":[{"end":"2016-12-31","val":0.01,"accn":"0001144204-18-012722","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-05","frame":"CY2016Q4I"},{"end":"2017-12-31","val":0.01,"accn":"0001144204-18-012722","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-05"},{"end":"2017-12-31","val":0.01,"accn":"0001144204-18-025554","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-07"},{"end":"2017-12-31","val":0.01,"accn":"0001144204-18-041264","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-01"},{"end":"2017-12-31","val":0.01,"accn":"0001144204-18-056361","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-10-31"},{"end":"2017-12-31","val":0.01,"accn":"0001144204-19-012700","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-07","frame":"CY2017Q4I"},{"end":"2018-03-31","val":0.01,"accn":"0001144204-18-025554","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-07","frame":"CY2018Q1I"},{"end":"2018-06-30","val":0.01,"accn":"0001144204-18-041264","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-01","frame":"CY2018Q2I"},{"end":"2018-09-30","val":0.01,"accn":"0001144204-18-056361","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-10-31","frame":"CY2018Q3I"},{"end":"2018-12-31","val":0.01,"accn":"0001144204-19-012700","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-07","frame":"CY2018Q4I"},{"end":"2019-03-31","val":0.01,"accn":"0001144204-19-022746","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-01","frame":"CY2019Q1I"},{"end":"2019-06-30","val":0.01,"accn":"0001144204-19-038114","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-07","frame":"CY2019Q2I"},{"end":"2019-09-30","val":0.01,"accn":"0001104659-19-057569","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-10-30","frame":"CY2019Q3I"}]}},"TemporaryEquitySharesAuthorized":{"label":"Temporary Equity, Shares Authorized","description":"The maximum number of securities classified as temporary equity that are permitted to be issued by an entity's charter and bylaws. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.","units":{"shares":[{"end":"2016-12-31","val":1000000,"accn":"0001144204-18-012722","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-05","frame":"CY2016Q4I"},{"end":"2017-12-31","val":1000000,"accn":"0001144204-18-012722","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-05"},{"end":"2017-12-31","val":1000000,"accn":"0001144204-18-025554","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-07"},{"end":"2017-12-31","val":1000000,"accn":"0001144204-18-041264","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-01"},{"end":"2017-12-31","val":1000000,"accn":"0001144204-18-056361","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-10-31"},{"end":"2017-12-31","val":1000000,"accn":"0001144204-19-012700","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-07","frame":"CY2017Q4I"},{"end":"2018-03-31","val":1000000,"accn":"0001144204-18-025554","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-07","frame":"CY2018Q1I"},{"end":"2018-06-30","val":1000000,"accn":"0001144204-18-041264","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-01","frame":"CY2018Q2I"},{"end":"2018-09-30","val":1000000,"accn":"0001144204-18-056361","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-10-31","frame":"CY2018Q3I"},{"end":"2018-12-31","val":1000000,"accn":"0001144204-19-012700","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-07","frame":"CY2018Q4I"},{"end":"2019-03-31","val":1000000,"accn":"0001144204-19-022746","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-01","frame":"CY2019Q1I"},{"end":"2019-06-30","val":1000000,"accn":"0001144204-19-038114","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-07","frame":"CY2019Q2I"},{"end":"2019-09-30","val":1000000,"accn":"0001104659-19-057569","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-10-30","frame":"CY2019Q3I"}]}},"TemporaryEquitySharesIssued":{"label":"Temporary Equity, Shares Issued","description":"The number of securities classified as temporary equity that have been sold (or granted) to the entity's shareholders. Securities issued include securities outstanding and securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.","units":{"shares":[{"end":"2016-12-31","val":0,"accn":"0001144204-18-012722","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-05","frame":"CY2016Q4I"},{"end":"2017-12-31","val":8370,"accn":"0001144204-18-012722","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-05"},{"end":"2017-12-31","val":8370,"accn":"0001144204-18-025554","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-07"},{"end":"2017-12-31","val":8370,"accn":"0001144204-18-041264","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-01"},{"end":"2017-12-31","val":8370,"accn":"0001144204-18-056361","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-10-31"},{"end":"2017-12-31","val":8370,"accn":"0001144204-19-012700","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-07","frame":"CY2017Q4I"},{"end":"2018-03-31","val":8370,"accn":"0001144204-18-025554","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-07","frame":"CY2018Q1I"},{"end":"2018-06-30","val":0,"accn":"0001144204-18-041264","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-01","frame":"CY2018Q2I"},{"end":"2018-09-30","val":0,"accn":"0001144204-18-056361","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-10-31","frame":"CY2018Q3I"},{"end":"2018-12-31","val":0,"accn":"0001144204-19-012700","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-07","frame":"CY2018Q4I"}]}},"TemporaryEquitySharesOutstanding":{"label":"Temporary Equity, Shares Outstanding","description":"The number of securities classified as temporary equity that have been issued and are held by the entity's shareholders. Securities outstanding equals securities issued minus securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.","units":{"shares":[{"end":"2016-12-31","val":0,"accn":"0001144204-18-012722","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-05","frame":"CY2016Q4I"},{"end":"2017-12-31","val":8370,"accn":"0001144204-18-012722","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-05"},{"end":"2017-12-31","val":8370,"accn":"0001144204-18-025554","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-07"},{"end":"2017-12-31","val":8370,"accn":"0001144204-18-041264","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-01"},{"end":"2017-12-31","val":8370,"accn":"0001144204-18-056361","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-10-31"},{"end":"2017-12-31","val":8370,"accn":"0001144204-19-012700","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-07","frame":"CY2017Q4I"},{"end":"2018-03-31","val":8370,"accn":"0001144204-18-025554","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-07","frame":"CY2018Q1I"},{"end":"2018-06-30","val":0,"accn":"0001144204-18-041264","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-01","frame":"CY2018Q2I"},{"end":"2018-09-30","val":0,"accn":"0001144204-18-056361","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-10-31","frame":"CY2018Q3I"},{"end":"2018-12-31","val":0,"accn":"0001144204-19-012700","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-07","frame":"CY2018Q4I"}]}},"TradingSecurities":{"label":"Debt 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Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Trading Securities which consist of all investments in certain debt and equity securities that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for which an entity has elected the fair value option. Trading generally reflects active and frequent buying and selling, and trading securities are generally used with the objective of generating profits on short-term differences in price, but this category of investments may also include items which are not intended to be sold in the near term or for which the fair value option has been elected.","units":{"USD":[{"end":"2011-12-31","val":1676000,"accn":"0001188112-13-000660","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-14","frame":"CY2011Q4I"},{"end":"2011-12-31","val":1676000,"accn":"0001188112-12-003206","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":1676000,"accn":"0001188112-12-002359","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2012-06-30","val":1759000,"accn":"0001188112-12-002359","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":1774000,"accn":"0001188112-12-003206","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":1789000,"accn":"0001188112-13-001390","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-08","frame":"CY2012Q4I"},{"end":"2012-12-31","val":1789000,"accn":"0001188112-13-000660","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-14"},{"end":"2013-03-31","val":1787000,"accn":"0001188112-13-001390","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-08","frame":"CY2013Q1I"}]}},"TradingSecuritiesUnrealizedHoldingGainLoss":{"label":"Trading 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