Commitments and Contingencies (Components of Lease Expense) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Operating lease cost	[1]	$ 2,532	$ 2,841
Variable lease cost		437	699
Sublease income		(431)	(460)
Net lease cost		$ 2,538	$ 3,080

[1] Includes short-term lease costs, which were immaterial.