Income Taxes (Provision (Benefit) For Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal, Current - US	$ 0	$ 0	$ (447)
Foreign, Current	17,522	11,583	4,586
State, Current - US	594	235	442
Total current	18,116	11,818	4,581
Federal, Deferred (prepaid) - US	8,414	621	(6,764)
Foreign, Deferred (prepaid)	(11,768)	(1,323)	(4,640)
State, Deferred (prepaid) - US	(86)	(1,665)	(388)
Total deferred (benefit)	(3,440)	(2,367)	(11,792)
Total provision (benefit) for income taxes	$ 14,676	$ 9,451	$ (7,211)