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Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (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
Current: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  |  |  |  | $ (20,824) | $ 58,507 | $ 10,621
State |  |  |  |  |  |  |  |  |  |  |  | (403) | 14,691 | (759)
Foreign |  |  |  |  |  |  |  |  |  |  |  | 9,195 | 15,545 | 2,968
Current Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  |  |  | (12,032) | 88,743 | 12,830
Deferred: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  |  |  |  | 41,986 | (53,711) | 62,704
State |  |  |  |  |  |  |  |  |  |  |  | (997) | (4,325) | (431)
Foreign |  |  |  |  |  |  |  |  |  |  |  | (6,162) | (4,410) | 1,482
Provision for valuation allowance on deferred tax assets |  |  |  |  |  |  |  |  |  |  |  | 3,601 | 15,764 | 0
Deferred Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  |  |  | 38,428 | (46,682) | 63,755
Total | $ 10,832 | $ 2,022 | $ 2,992 | $ 10,165 | $ 11,217 | $ 18,309 | $ 8,873 | $ 8,496 | $ 6,383 | $ 21,866 | $ 24,374 | $ 26,396 | $ 42,061 | $ 76,585

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