Leases (Supplemental Cash Flows Information) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 51,918	$ 39,642
Financing cash flows from finance leases	3,408	4,177
ROU assets obtained in exchange for lease obligations:
Operating leases	16,327	15,739
Finance leases	$ 12,278	$ 10,184
Weighted average remaining lease term (in years)
Operating leases	8 years	9 years
Finance leases	7 years	4 years
Weighted average discount rate (percent)
Operating leases	4.40%	4.60%
Finance leases	3.50%	3.70%