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Income Taxes - Schedule of Income Before Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Tax Disclosure [Abstract]                            
Domestic                       $ (401,741) $ 76,957 $ 176,075
Foreign                       (41,418) 275,522 81,433
Income (loss) before income taxes $ (55,918) $ (519,773) $ (72,266) $ 77,177 $ 71,703 $ 153,584 $ 69,445 $ 74,158 $ 55,292 $ (589) $ 76,614 $ (443,159) $ 352,479 $ 257,508