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Assets, Current","description":"Amount of current assets classified as 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Amount excludes temporary equity. Alternate caption for the concept is permanent equity.","units":{"USD":[{"end":"2009-12-31","val":326398000,"accn":"0001104659-11-044069","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-05","frame":"CY2009Q4I"},{"end":"2010-06-30","val":360919000,"accn":"0001104659-11-044069","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-05","frame":"CY2010Q2I"},{"end":"2010-12-31","val":328523000,"accn":"0001104659-11-044069","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-05","frame":"CY2010Q4I"},{"end":"2011-06-30","val":326355000,"accn":"0001104659-11-044069","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-05","frame":"CY2011Q2I"}]}},"StockIssuedDuringPeriodValueConversionOfConvertibleSecurities":{"label":"Stock Issued During Period, Value, Conversion of Convertible Securities","description":"The gross value of stock issued during the period upon the conversion of convertible securities.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":32000,"accn":"0001047469-12-002000","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-01","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":27168000,"accn":"0001104659-11-044069","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-05"},{"start":"2010-01-01","end":"2010-09-30","val":27168000,"accn":"0001104659-11-059201","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-10-31"},{"start":"2010-01-01","end":"2010-12-31","val":27168000,"accn":"0001047469-13-002153","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-05","frame":"CY2010"},{"start":"2010-01-01","end":"2010-12-31","val":27168000,"accn":"0001047469-12-002000","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-01"}]}},"StockIssuedDuringPeriodValueShareBasedCompensation":{"label":"Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture","description":"Value, after forfeiture, of shares issued under share-based payment arrangement. 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DuringPeriodValueStockOptionsExercised":{"label":"Stock 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