Income Taxes (Provision (Benefit) for Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Federal income taxes:
Current	$ 9,340	$ 13,928	$ 5,801
Deferred	(2,195)	(3,803)	(3,541)
Federal Income Tax Expense (Benefit), Continuing Operations, Total	7,145	10,125	2,260
State income taxes:
Current	3,050	3,337	2,764
Deferred	(1,889)	(2,269)	(1,792)
State and Local Income Tax Expense (Benefit), Continuing Operations, Total	1,161	1,068	972
Foreign income taxes:
Current	497	(11,545)	5,302
Deferred	5,314	18,310	(630)
Foreign Income Tax Expense (Benefit), Continuing Operations, Total	5,811	6,765	4,672
Total provision for income taxes	$ 14,117	$ 17,958	$ 7,904