Income Taxes (Income Tax Expense (Benefit) in the Consolidated Statements of Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current
Domestic	$ 2,078	$ 993	$ 2,205
International	24,537	15,192	17,172
Total	26,615	16,185	19,377
Deferred
Domestic	3,376	4,272	6,984
International	4,006	(604)	1,451
Total	7,382	3,668	8,435
Domestic	5,454	5,265	9,189
International	28,543	14,588	18,623
Total	$ 33,997	$ 19,853	$ 27,812