Taxes - Constituents of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ 16,430	$ 18,852	$ 5,935
State	378	608	466
Foreign	4,946	4,854	3,167
Current income tax expense (benefit), Total	21,754	24,314	9,568
Deferred:
Federal	(2,541)	(2,569)	1,580
State	(165)	7	119
Foreign	250	(837)	6
Deferred income tax expense (benefit), Total	(2,456)	(3,399)	1,705
Income tax expense (benefit), continuing operations, Total	$ 19,298	$ 20,915	$ 11,273

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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