Leases (Supplemental Balance Sheet Information Related To Leases) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Operating lease right-of-use assets	$ 224,754	$ 227,367
Operating lease liabilities - current portion	24,397	23,737
Operating lease liabilities - non-current portion	220,215	223,364
Total operating lease liabilities	244,612	247,101
Property plant and equipment, gross	378	374
Accumulated depreciation	(326)	(311)
Property plant and equipment, net	52	63
Other current liabilities	37	40
Other long-term liabilities	20	28
Total finance lease liabilities	$ 57	$ 68
Weighted-average remaining lease term - finance leases	1 year	2 years
Weighted-average remaining lease term - operating leases	11 years	11 years
Weighted-average discount rate - finance leases	5.23%	5.24%
Weighted-average discount rate - operating leases	4.46%	4.47%