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Leases (Supplemental Cash Flows Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 66,478	$ 64,725
Financing cash flows from finance leases	4,704	4,465
ROU assets obtained in exchange for lease obligations:
Operating leases	62,425	14,569
Finance leases	$ 13,124	$ 10,615
Weighted average remaining lease term (in years)
Operating leases	9 years	9 years
Finance leases	7 years	3 years
Weighted average discount rate (percent)
Operating leases	4.20%	4.50%
Finance leases	3.50%	3.60%

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