Leases (Supplemental Balance Sheet Information Related To Leases) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Leases [Abstract]
Operating lease right-of-use assets	$ 180,718	$ 200,417
Operating lease liabilities - current portion	22,977	23,971
Operating lease liabilities - non-current portion	180,002	200,037
Total operating lease liabilities	202,979	224,008
Property plant and equipment, gross	356	363
Accumulated depreciation	(353)	(338)
Property plant and equipment, net	3	25
Other current liabilities	3	28
Total finance lease liabilities	$ 3	$ 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	4.56%	4.55%