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d 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Alternate caption for the concept is permanent equity.","units":{"USD":[{"end":"2008-12-31","val":-27581000,"accn":"0001193125-12-113802","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-14","frame":"CY2008Q4I"},{"end":"2009-12-31","val":-119657000,"accn":"0001193125-12-113802","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-14"},{"end":"2009-12-31","val":-119657000,"accn":"0001287151-13-000020","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-11","frame":"CY2009Q4I"},{"end":"2010-12-31","val":18735000,"accn":"0001193125-12-113802","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-14"},{"end":"2010-12-31","val":18735000,"accn":"0001287151-13-000020","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-11"},{"end":"2010-12-31","val":18735000,"accn":"0001287151-14-000012","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-04","frame":"CY2010Q4I"},{"end":"2011-12-31","val":-2305000,"accn":"0001193125-12-113802","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-14"},{"end":"2011-12-31","val":-2305000,"accn":"0001287151-13-000020","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-11"},{"end":"2011-12-31","val":-2305000,"accn":"0001287151-14-000012","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-04"},{"end":"2011-12-31","val":-2305000,"accn":"0001287151-15-000021","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-04","frame":"CY2011Q4I"},{"end":"2012-12-31","val":-29061000,"accn":"0001287151-13-000020","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-11"},{"end":"2012-12-31","val":-29061000,"accn":"0001287151-14-000012","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-04"},{"end":"2012-12-31","val":-29061000,"accn":"0001287151-15-000021","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-04"},{"end":"2012-12-31","val":-29061000,"accn":"0001287151-16-000125","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-14","frame":"CY2012Q4I"},{"end":"2013-12-31","val":-11449000,"accn":"0001287151-14-000012","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-04"},{"end":"2013-12-31","val":-11449000,"accn":"0001287151-15-000021","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-04"},{"end":"2013-12-31","val":-11449000,"accn":"0001287151-16-000125","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-14"},{"end":"2013-12-31","val":-11449000,"accn":"0001287151-17-000013","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01","frame":"CY2013Q4I"},{"end":"2014-12-31","val":-74110000,"accn":"0001287151-15-000021","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-04"},{"end":"2014-12-31","val":-74110000,"accn":"0001287151-16-000125","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-14"},{"end":"2014-12-31","val":-74110000,"accn":"0001287151-17-000013","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01"},{"end":"2014-12-31","val":-74110000,"accn":"0001287151-18-000047","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28","frame":"CY2014Q4I"},{"end":"2015-12-31","val":-113070000,"accn":"0001287151-16-000125","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-14"},{"end":"2015-12-31","val":-113070000,"accn":"0001287151-17-000013","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01"},{"end":"2015-12-31","val":-113070000,"accn":"0001287151-18-000047","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28","frame":"CY2015Q4I"},{"end":"2016-12-31","val":-146905000,"accn":"0001287151-17-000013","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01"},{"end":"2016-12-31","val":-146905000,"accn":"0001287151-18-000047","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28","frame":"CY2016Q4I"},{"end":"2017-12-31","val":-136466000,"accn":"0001287151-18-000047","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28","frame":"CY2017Q4I"}]}},"StockholdersEquityNoteStockSplitConversionRatio":{"label":"Stockholders' Equity Note, Stock Split, Conversion Ratio (Deprecated 2013-01-31)","description":"This item represents the conversion ratio used in the calculation of a stock split.","units":{"pure":[{"start":"2010-04-25","end":"2010-05-25","val":20,"accn":"0001193125-12-113802","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-14"},{"start":"2010-05-24","end":"2010-05-25","val":20,"accn":"0001287151-13-000020","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-11"}]}},"StockIssuedDuringPeriodValueNewIssues":{"label":"Stock Issued During Period, Value, New Issues","description":"Equity impact of the value of new stock issued during the period. 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