Leases (Maturity Of Leases As Lessee) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Operating leases, 2019	$ 23,566
Operating leases, 2020	31,434
Operating leases, 2021	31,717
Operating leases, 2022	31,901
Operating leases, 2023	31,018
Operating leases, Thereafter	169,221
Operating leases, Total lease payments	318,857
Operating lease, Less imputed interest	(76,466)
Total operating lease liabilities	242,391
Finance leases, 2019	133
Finance leases, 2020	101
Finance leases, 2021	53
Finance leases, 2022	43
Finance leases, 2023	28
Finance leases, Total lease payments	358
Finance lease, Less imputed interest	(27)
Total finance lease liabilities	$ 331