Leases (Lease Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease cost	$ 51,089	$ 49,704	$ 50,163
Variable lease cost	13,311	11,988	9,448
Sublease income	(917)	(1,064)	(878)
Net lease cost	$ 63,483	$ 60,628	$ 58,733