Leases (Components Of Cash Flow Information Related To Leases) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from leases	$ 25,901	$ 24,967
Leased assets obtained in exchange for new operating lease liabilities	$ 25,685	$ 40,133
Weighted Average Remaining Lease Term, Operating leases	4 years 10 months 24 days
Weighted Average Discount Rate, Operating leases	2.56%