Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Components of income before income taxes:
Domestic operations	$ 63,867	$ 4,784	$ 2,814
Foreign operations	25,355	27,366	39,252
Income before income taxes	$ 89,222	$ 32,150	$ 42,066