Leases (Supplemental Balance Sheet Information Related To Leases) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019
Leases [Abstract]
Operating lease right-of-use assets	$ 229,879	$ 232,319
Operating lease liabilities - current portion	20,379	$ 245,280
Operating lease liabilities - non-current portion	223,164
Total operating lease liabilities	243,543
Property plant and equipment, gross	370
Accumulated depreciation	(165)
Property plant and equipment, net	205
Other current liabilities	93
Other long-term liabilities	116
Total finance lease liabilities	$ 209
Weighted-average remaining lease term - finance leases	3 years
Weighted-average remaining lease term - operating leases	11 years
Weighted-average discount rate - finance leases	5.13%
Weighted-average discount rate - operating leases	4.86%