Leases (Supplemental Balance Sheet Information Related To Leases) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019
Leases [Abstract]
Operating lease right-of-use assets	$ 216,963	$ 232,319
Operating lease liabilities - current portion	19,579	$ 245,280
Operating lease liabilities - non-current portion	210,737
Total operating lease liabilities	230,316
Property plant and equipment, gross	362
Accumulated depreciation	(121)
Property plant and equipment, net	241
Other current liabilities	117
Other long-term liabilities	128
Total finance lease liabilities	$ 245
Weighted-average remaining lease term - finance leases	3 years
Weighted-average remaining lease term - operating leases	11 years
Weighted-average discount rate - finance leases	5.10%
Weighted-average discount rate - operating leases	4.98%