Income Taxes (Provision For Income Taxes Charged To Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
Current tax expense, U.S. federal	$ 13,579	$ 12,678	$ 11,292
Current tax expense, State	1,251	446	1,302
Current tax expense, Foreign	22,631	11,874	8,314
Current tax expense, Total current	37,461	24,998	20,908
Deferred tax expense (benefit), U.S. federal	2,373	14,148	(2,330)
Deferred tax expense (benefit), State	323	747	(42)
Deferred tax expense (benefit), Foreign	(8,126)	(3,114)	(868)
Total deferred	(5,430)	11,781	(3,240)
Change in valuation allowance	(130)	(762)
Total provision	$ 31,901	$ 36,017	$ 17,668