Leases - Balance Sheet Classification (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Assets
Operating lease assets, gross	$ 626,855
Accumulated amortization	(35,181)
Total operating lease assets	591,674
Fixed assets, gross	8,337
Accumulated depreciation	(1,077)
Total finance lease assets	7,260
Total lease assets	598,934
Liabilities
Current portion of operating lease liabilities	72,709
Current portion of long-term debt	1,805
Long-term operating lease liabilities	562,063
Long-term debt	5,339
Lease liabilities	$ 641,916