Leases (Supplemental Cash Flows Information) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 36,067	$ 26,448
Financing cash flows from finance leases	2,026	2,297
ROU assets obtained in exchange for lease obligations:
Operating leases	13,964	11,983
Finance leases	$ 3,143	$ 6,006
Weighted average remaining lease term (in years)
Operating leases	8 years	9 years
Finance leases	3 years	3 years
Weighted average discount rate (percent)
Operating leases	4.50%	4.50%
Finance leases	3.50%	3.80%