Leases (Other Lease Related Information) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) Rate
Leases [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities, operating cash flows from operating leases	$ 78,298
Right-of-use asset obtained in exchange for new operating lease liability	$ 10,940
Weighted-average remaining lease term - operating leases	10 years 6 months
Weighted-average discount rate - operating leases | Rate	4.20%