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Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.","units":{"USD":[{"end":"2012-09-30","val":9045000,"accn":"0001193125-13-211509","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-05-10"},{"end":"2012-09-30","val":9045000,"accn":"0001193125-13-329402","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-08-09"},{"end":"2012-09-30","val":9045000,"accn":"0001193125-13-465490","fy":2013,"fp":"FY","form":"10-K","filed":"2013-12-09","frame":"CY2012Q3I"},{"end":"2013-03-31","val":152099000,"accn":"0001193125-13-211509","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":154312000,"accn":"0001193125-13-329402","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-08-09","frame":"CY2013Q2I"},{"end":"2013-09-30","val":156032000,"accn":"0001193125-13-465490","fy":2013,"fp":"FY","form":"10-K","filed":"2013-12-09"},{"end":"2013-09-30","val":156032000,"accn":"0001193125-14-046191","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-02-12"},{"end":"2013-09-30","val":156032000,"accn":"0001193125-14-199908","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-05-15"},{"end":"2013-09-30","val":156032000,"accn":"0001193125-14-301415","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-08-08"},{"end":"2013-09-30","val":156032000,"accn":"0001193125-14-417399","fy":2014,"fp":"FY","form":"10-K","filed":"2014-11-19","frame":"CY2013Q3I"},{"end":"2013-12-31","val":159453000,"accn":"0001193125-14-046191","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-02-12","frame":"CY2013Q4I"},{"end":"2014-03-31","val":165657000,"accn":"0001193125-14-199908","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-05-15","frame":"CY2014Q1I"},{"end":"2014-06-30","val":168530000,"accn":"0001193125-14-301415","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-08-08","frame":"CY2014Q2I"},{"end":"2014-09-30","val":172245000,"accn":"0001193125-14-417399","fy":2014,"fp":"FY","form":"10-K","filed":"2014-11-19"},{"end":"2014-09-30","val":172245000,"accn":"0001193125-15-046862","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-02-12"},{"end":"2014-09-30","val":172245000,"accn":"0001193125-15-182159","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-05-11"},{"end":"2014-09-30","val":172245000,"accn":"0001193125-15-285027","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-08-10","frame":"CY2014Q3I"},{"end":"2014-12-31","val":174849000,"accn":"0001193125-15-046862","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-02-12","frame":"CY2014Q4I"},{"end":"2015-03-31","val":178733000,"accn":"0001193125-15-182159","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-05-11","frame":"CY2015Q1I"},{"end":"2015-06-30","val":182067000,"accn":"0001193125-15-285027","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-08-10","frame":"CY2015Q2I"}]}},"AdditionalPaidInCapitalCommonStock":{"label":"Additional Paid in Capital, Common Stock","description":"Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. 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An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning 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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":"2015-09-30","val":0,"accn":"0001564590-16-029481","fy":2016,"fp":"FY","form":"10-K","filed":"2016-11-18","frame":"CY2015Q3I"},{"end":"2016-09-30","val":0,"accn":"0001564590-16-029481","fy":2016,"fp":"FY","form":"10-K","filed":"2016-11-18"},{"end":"2016-09-30","val":0,"accn":"0001564590-17-023880","fy":2017,"fp":"FY","form":"10-K","filed":"2017-11-15","frame":"CY2016Q3I"},{"end":"2017-09-30","val":0,"accn":"0001564590-17-023880","fy":2017,"fp":"FY","form":"10-K","filed":"2017-11-15"},{"end":"2017-09-30","val":0,"accn":"0001118417-18-000009","fy":2018,"fp":"FY","form":"10-K","filed":"2018-11-16","frame":"CY2017Q3I"},{"end":"2018-09-30","val":0,"accn":"0001118417-18-000009","fy":2018,"fp":"FY","form":"10-K","filed":"2018-11-16"},{"end":"2018-09-30","val":0,"accn":"0001118417-19-000095","fy":2019,"fp":"FY","form":"10-K","filed":"2019-11-15","frame":"CY2018Q3I"},{"end":"2019-09-30","val":0,"accn":"0001118417-19-000095","fy":2019,"fp":"FY","form":"10-K","filed":"2019-11-15","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. 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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. 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