Income Taxes (Provision (Benefit) for Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Federal income taxes:
Current	$ 5,801	$ 3,437	$ 12,393
Deferred	(3,541)	(1,924)	(5,393)
Federal Income Tax Expense (Benefit), Continuing Operations, Total	2,260	1,513	7,000
State income taxes:
Current	2,764	683	4,302
Deferred	(1,792)	684	(1,422)
State and Local Income Tax Expense (Benefit), Continuing Operations, Total	972	1,367	2,880
Foreign income taxes:
Current	5,302	5,643	7,753
Deferred	(630)	(1,134)	(3,540)
Foreign Income Tax Expense (Benefit), Continuing Operations, Total	4,672	4,509	4,213
Total provision for income taxes	$ 7,904	$ 7,389	$ 14,093