Leases (Lease Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Leases [Abstract]
Lease cost	$ 11,429	$ 10,878	$ 22,693	$ 22,114
Cash paid for amounts included in the measurement of lease liabilities reported in operating cash flows	11,920	11,479	23,297	22,309
Right-of-use assets (reduced) obtained in exchange for new lease liabilities	$ (181)	$ 2,682	$ (151)	$ 4,294