Leases (Components of Lease Cost Reported in General and Administrative Expenses in Consolidated Statements of Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease costs	$ 11,150	$ 9,197	$ 7,219
Short-term lease costs	739	761	585
Total lease costs	11,889	9,958	7,804
Less: sublease income	(679)	(323)	(312)
Total lease costs, net	$ 11,210	$ 9,635	$ 7,492