Leases (Supplemental Cash Flow Information) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Cash Flow, Operating Activities, Lessee [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities, operating cash flows from operating leases	$ 318,048
Right-of-use asset obtained in exchange for new operating lease liability	$ 233,584
Weighted-average remaining lease term - operating leases	10 years 4 months 24 days
Weighted-average discount rate - operating leases	4.10%