Leases (Supplemental Balance Sheet Information Related To Leases) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Leases [Abstract]
Operating lease right-of-use assets	$ 189,008	$ 200,417
Operating lease liabilities - current portion	23,732	23,971
Operating lease liabilities - non-current portion	188,016	200,037
Total operating lease liabilities	211,748	224,008
Property plant and equipment, gross	360	363
Accumulated depreciation	(350)	(338)
Property plant and equipment, net	10	25
Other current liabilities	11	28
Total finance lease liabilities	$ 11	$ 28
Weighted-average remaining lease term - finance leases	0 years	1 year
Weighted-average remaining lease term - operating leases	11 years	11 years
Weighted-average discount rate - finance leases	5.21%	5.21%
Weighted-average discount rate - operating leases	4.55%	4.55%