Leases (Maturity Of Leases As Lessee) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating leases, 2021	$ 24,947
Operating leases, 2022	33,202
Operating leases, 2023	32,406
Operating leases, 2024	30,531
Operating leases, 2025	28,368
Operating leases, Thereafter	143,508
Operating leases, Total lease payments	292,962
Operating leases, Less imputed interest	(64,256)
Total operating lease liabilities	228,706	$ 235,505
Finance leases, 2021	41
Finance leases, 2022	43
Finance leases, 2023	28
Finance leases, Total lease payments	112
Finance leases, Less imputed interest	(7)
Total finance lease liabilities	$ 105	$ 118