Leases (Components Of Cash Flow Information Related To Leases) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from leases	$ 49,932	$ 41,525
Leased assets obtained in exchange for new operating lease liabilities	$ 58,802	$ 150,356
Weighted Average Remaining Lease Term, Operating leases	4 years 11 months 23 days
Weighted Average Discount Rate, Operating leases	2.87%