Leases (Supplemental Balance Sheet Information Related To Leases) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
Leases [Abstract]
Operating lease right-of-use assets	$ 224,878	$ 232,319
Operating lease liabilities - current portion	19,658	$ 245,280
Operating lease liabilities - non-current portion	218,610
Total operating lease liabilities	238,268
Property plant and equipment, gross	369
Accumulated depreciation	(82)
Property plant and equipment, net	287
Other current liabilities	145
Other long-term liabilities	144
Total finance lease liabilities	$ 289
Weighted-average remaining lease term - finance leases	3 years
Weighted-average remaining lease term - operating leases	11 years
Weighted-average discount rate - finance leases	5.07%
Weighted-average discount rate - operating leases	4.98%