Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Leases
Right of Use Assets, net	$ 199,877	$ 201,128	$ 206,980
Short-term lease liabilities	11,244	10,709
Long-term lease liabilities	191,212	188,149
Operating Lease, Liability, Total	202,456	198,858
Property and equipment, at cost	2,385,757	2,345,283	2,306,096
Accumulated depreciation	(1,100,862)	(1,061,287)	(1,005,764)
Total property and equipment, net	1,284,895	$ 1,283,996	$ 1,300,332
Short-term lease liabilities	28
Long-term lease liabilities	645
Total finance lease obligations	673
Finance Leases
Leases
Property and equipment, at cost	857
Accumulated depreciation	(9)
Total property and equipment, net	$ 848