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Income Taxes - Provisions (Benefits) for Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Disclosure [Abstract]      
Current: Federal $ 20,937 $ 361 $ 5,527
State 2,103 1,215 1,600
Foreign 1,462 644 227
Subtotal Current 24,502 2,220 7,354
Deferred: Federal 26,735 (12,604) (28,092)
State 444 (99) (2,131)
Foreign (43) (399) 0
Subtotal Deferred 27,136 (13,102) (30,223)
Income tax (benefit) expense $ 51,638 $ (10,882) $ (22,869)