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Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2014-12-31","val":0,"accn":"0001193125-15-062799","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-25","frame":"CY2014Q4I"},{"end":"2015-12-31","val":39000,"accn":"0001475274-16-000006","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19","frame":"CY2015Q4I"}]}},"PurchaseObligationDueInFourthYear":{"label":"Purchase Obligation, to be Paid, Year Four","description":"Amount of purchase arrangement to be paid in fourth fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2014-12-31","val":0,"accn":"0001193125-15-062799","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-25","frame":"CY2014Q4I"},{"end":"2015-12-31","val":39000,"accn":"0001475274-16-000006","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19","frame":"CY2015Q4I"},{"end":"2016-12-31","val":39000,"accn":"0001475274-17-000003","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-17","frame":"CY2016Q4I"}]}},"PurchaseObligationDueInNextTwelveMonths":{"label":"Purchase Obligation, to be Paid, Year One","description":"Amount of purchase arrangement to be paid in next fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2014-12-31","val":4313000,"accn":"0001193125-15-062799","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-25","frame":"CY2014Q4I"},{"end":"2015-12-31","val":8824000,"accn":"0001475274-16-000006","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19","frame":"CY2015Q4I"},{"end":"2016-12-31","val":2593000,"accn":"0001475274-17-000003","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-17","frame":"CY2016Q4I"}]}},"PurchaseObligationDueInSecondYear":{"label":"Purchase Obligation, to be Paid, Year Two","description":"Amount of purchase arrangement to be paid in second fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2014-12-31","val":490000,"accn":"0001193125-15-062799","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-25","frame":"CY2014Q4I"},{"end":"2015-12-31","val":516000,"accn":"0001475274-16-000006","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19","frame":"CY2015Q4I"},{"end":"2016-12-31","val":560000,"accn":"0001475274-17-000003","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-17","frame":"CY2016Q4I"}]}},"PurchaseObligationDueInThirdYear":{"label":"Purchase Obligation, to be Paid, Year Three","description":"Amount of purchase arrangement to be paid in third fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2014-12-31","val":245000,"accn":"0001193125-15-062799","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-25","frame":"CY2014Q4I"},{"end":"2015-12-31","val":40000,"accn":"0001475274-16-000006","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19","frame":"CY2015Q4I"},{"end":"2016-12-31","val":114000,"accn":"0001475274-17-000003","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-17","frame":"CY2016Q4I"}]}},"RepaymentsOfDebt":{"label":"Repayments of Debt","description":"The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.","units":{"USD":[{"start":"2012-01-01","end":"2012-06-30","val":15883000,"accn":"0001193125-13-370831","fy":2013,"fp":"Q2","form":"10-Q/A","filed":"2013-09-19"},{"start":"2012-01-01","end":"2012-09-30","val":18108000,"accn":"0001193125-13-428620","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-06"},{"start":"2013-01-01","end":"2013-06-30","val":6200000,"accn":"0001193125-13-370831","fy":2013,"fp":"Q2","form":"10-Q/A","filed":"2013-09-19"},{"start":"2013-01-01","end":"2013-09-30","val":12200000,"accn":"0001193125-13-428620","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-06"}]}},"RepaymentsOfLongTermCapitalLeaseObligations":{"label":"Repayments of Long-term Capital Lease Obligations","description":"The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if 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