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Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2012-12-31","val":2238000,"accn":"0001144204-13-013617","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-07","frame":"CY2012Q4I"},{"end":"2013-12-31","val":1786000,"accn":"0001144204-14-013980","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-07","frame":"CY2013Q4I"},{"end":"2014-12-31","val":1562000,"accn":"0001144204-15-012552","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-27","frame":"CY2014Q4I"},{"end":"2015-12-31","val":1339000,"accn":"0001144204-16-084980","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-29","frame":"CY2015Q4I"},{"end":"2016-12-31","val":1241000,"accn":"0001144204-17-011747","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28","frame":"CY2016Q4I"},{"end":"2017-12-31","val":5613000,"accn":"0001144204-18-011448","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28","frame":"CY2017Q4I"}]}},"CapitalLeasesFutureMinimumPaymentsDueInFiveYears":{"label":"Capital Leases, Future Minimum Payments Due in Five Years","description":"Amount of minimum lease payments for capital leases due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2012-12-31","val":1557000,"accn":"0001144204-13-013617","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-07","frame":"CY2012Q4I"},{"end":"2013-12-31","val":6479000,"accn":"0001144204-14-013980","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-07","frame":"CY2013Q4I"},{"end":"2014-12-31","val":0,"accn":"0001144204-15-012552","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-27","frame":"CY2014Q4I"},{"end":"2015-12-31","val":0,"accn":"0001144204-16-084980","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-29","frame":"CY2015Q4I"}]}},"CapitalLeasesFutureMinimumPaymentsDueInFourYears":{"label":"Capital Leases, Future Minimum Payments Due in Four Years","description":"Amount of minimum lease payments for capital leases due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2012-12-31","val":1625000,"accn":"0001144204-13-013617","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-07","frame":"CY2012Q4I"},{"end":"2013-12-31","val":1621000,"accn":"0001144204-14-013980","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-07","frame":"CY2013Q4I"},{"end":"2014-12-31","val":5660000,"accn":"0001144204-15-012552","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-27","frame":"CY2014Q4I"},{"end":"2015-12-31","val":0,"accn":"0001144204-16-084980","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-29","frame":"CY2015Q4I"}]}},"CapitalLeasesFutureMinimumPaymentsDueInThreeYears":{"label":"Capital Leases, Future Minimum Payments Due in Three Years","description":"Amount of minimum lease payments for capital leases due in the third fiscal year following the latest fiscal year. 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This item includes treasury stock repurchased by the entity. 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For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.","units":{"USD":[{"start":"2016-01-01","end":"2016-12-31","val":17261000,"accn":"0001144204-18-011448","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":18720000,"accn":"0001144204-18-011448","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28"},{"start":"2017-01-01","end":"2017-12-31","val":18720000,"accn":"0001144204-19-010395","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-27","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":16953000,"accn":"0001144204-19-010395","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-27","frame":"CY2018"}]}},"DefinedBenefitPlanPlanAssetsTargetAllocationPercentage":{"label":"Defined Benefit Plan, Plan Assets, Target Allocation, Percentage","description":"Percentage of target investment allocation to total plan assets. 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Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, 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Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.","units":{"shares":[{"start":"2016-06-17","end":"2019-03-31","val":829648,"accn":"0001144204-19-023283","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-02"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0001144204-19-023283","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-02","frame":"CY2019Q1"},{"start":"2016-06-17","end":"2019-06-30","val":829648,"accn":"0001558370-19-006335","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-07-25"},{"start":"2019-01-01","end":"2019-06-30","val":0,"accn":"0001558370-19-006335","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-07-25"}]}},"StockRepurchasedDuringPeriodValue":{"label":"Stock Repurchased During Period, Value","description":"Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.","units":{"USD":[{"start":"2016-06-17","end":"2019-03-31","val":18900000,"accn":"0001144204-19-023283","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-02"},{"start":"2016-06-17","end":"2019-06-30","val":18900000,"accn":"0001558370-19-006335","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-07-25"}]}},"StockRepurchaseProgramAuthorizedAmount1":{"label":"Stock Repurchase Program, Authorized Amount","description":"Amount of stock repurchase plan authorized.","units":{"USD":[{"end":"2016-06-17","val":100000000,"accn":"0001144204-16-131114","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-02"},{"end":"2016-06-17","val":100000000,"accn":"0001144204-17-023916","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-02"},{"end":"2016-06-17","val":100000000,"accn":"0001144204-17-038320","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-07-26"},{"end":"2016-06-17","val":100000000,"accn":"0001144204-17-054803","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-10-30"},{"end":"2016-06-17","val":100000000,"accn":"0001144204-18-025082","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-03"},{"end":"2016-06-17","val":100000000,"accn":"0001144204-18-041087","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-07-31"},{"end":"2016-06-17","val":100000000,"accn":"0001144204-18-055836","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-10-29"},{"end":"2016-06-17","val":100000000,"accn":"0001144204-19-023283","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-02"},{"end":"2016-06-17","val":100000000,"accn":"0001558370-19-006335","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-07-25","frame":"CY2016Q2I"}]}},"TemporaryEquityRedemptionValue":{"label":"Temporary Equity, Redemption Value (Deprecated 2014-01-31)","description":"The aggregate amount to be paid by the entity upon redemption of the security that is classified as temporary equity. 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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":{"USD":[{"end":"2010-12-31","val":100000,"accn":"0001144204-13-013617","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-07","frame":"CY2010Q4I"}]}},"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. 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