Income Taxes (Pre-Tax Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
US	$ (80)	$ 1,384	$ 8,807
Non US	96,011	85,255	68,645
Total	$ 95,931	$ 86,639	$ 77,452