Leases Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
Operating lease liabilities	$ 493,091
Total leased assets	585,519
Total lease liabilities	577,068
Other assets [Member]
Operating leased assets	494,803
Property and equipment, net [Member]
Finance leased assets, net	90,716
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	29,200
Accrued expenses [Member]
Operating lease liabilities, current	65,004
Current portion of long-term debt [Member]
Finance lease liabilities, current	11,477
Other long-term liabilities [Member]
Operating lease liabilities, non-current	428,087
Long-term debt, less current portion [Member]
Finance lease liabilities, non-current	$ 72,500
Accounting Standards Update 2016-02 [Member]
Operating leased assets		$ 495,000
Operating lease liabilities		$ 495,000