Income Taxes (Components of Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income (loss) before taxes:
U.S.	$ 58,822	$ 10,088	$ (34,406)
Foreign	60,500	55,069	52,586
Income before income taxes	119,322	65,157	18,180
Current income taxes:
U.S. federal	1,284	1,156	1,383
U.S. state	1,427	246	127
Foreign	13,373	12,359	9,525
Total current income taxes	16,084	13,761	11,035
Deferred income taxes:
U.S. federal	(10,249)	276	1,300
U.S. state	(3,579)	0	0
Foreign	(2,431)	683	(4,393)
Total deferred income taxes	(16,259)	959	(3,093)
Total income tax expense (benefit)	$ (175)	$ 14,720	$ 7,942