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