Leases (Components of Lease Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease cost	$ 64,902	$ 52,882	$ 41,559
Amortization of leased assets	14,196	6,520	5,240
Interest on lease liabilities	2,768	987	933
Total finance lease cost	16,964	7,507	6,173
Short-term lease cost	6,264	7,188	8,927
Variable lease cost	7,409	5,307	5,416
Net lease cost	95,539	72,884	62,075
Operating cash flows for operating leases	64,786	53,323	39,870
Operating cash flows for finance leases	1,745	946	893
Financing cash flows for finance leases	$ 20,373	$ 9,851	$ 6,574
Operating leases, Weighted average remaining lease term	3 years 2 months 12 days	3 years 10 months 24 days	4 years 8 months 12 days
Finance leases, Weighted average remaining lease term	3 years 1 month 6 days	3 years 1 month 6 days	3 years 7 months 6 days
Operating lease, Weighted average discount rate	3.60%	4.00%	4.20%
Finance lease, Weighted average discount rate	3.20%	4.00%	4.60%