Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill and Other Intangible Assets
Impairment of Goodwill	$ 0	$ 0	$ 0
Goodwill, Beginning Balance	518,592,000	514,996,000
Acquisition	186,771,000	685,000
Foreign currency translation	(1,992,000)	2,911,000
Goodwill, Ending Balance	$ 703,371,000	$ 518,592,000	$ 514,996,000