Summary of Significant Accounting Policies - Supplemental Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Operating lease right-of-use assets	$ 1,906,678	$ 1,869,101
Financing lease right-of-use assets, net of accumulated depreciation	316,422	327,215
Total	2,223,100	2,196,316
Current
Operating lease liabilities	229,331	223,249
Financing lease liabilities	44,427	46,582
Total current lease liabilities	273,758	269,831
Long-term
Operating lease liabilities	1,760,478	1,728,686
Financing lease liabilities	312,415	320,600
Total long-term lease liabilities	2,072,893	2,049,286
Total	$ 2,346,651	$ 2,319,117
Operating lease, right-of-use asset, real estate assets, percent	99.00%	99.00%
Operating lease, right-of-use asset, non-real estate assets, percent	1.00%	1.00%
Finance lease, right-of-use asset, real estate assets, percent	69.00%	69.00%
Finance lease, right-of-use asset, non-real estate assets, percent	31.00%	31.00%