Goodwill and Other Intangible Assets (Goodwill) (Details) - USD ($) $ in Thousands			12 Months Ended
	Dec. 04, 2019	Feb. 11, 2019	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Roll Forward]
Goodwill beginning balance			$ 618,042	$ 400,440
Goodwill, Acquired During Period	$ 700	$ 215,800	0	217,482
Goodwill, Purchase Accounting Adjustments			(1,009)	0
Foreign currency translation			1,407	120
Goodwill ending balance			618,440	618,042
Accumulated goodwill impairment loss			$ 107,000	$ 107,000