Summary of Significant Accounting Policies Summary of Significant Accounting Policies - Supplemental Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Operating lease right-of-use assets	$ 1,947,665	$ 1,869,101
Financing lease right-of-use assets, net of accumulated depreciation	310,964	327,215
Total	2,258,629	2,196,316
Current
Operating lease liabilities	232,926	223,249
Financing lease liabilities	43,582	46,582
Total current lease liabilities	276,508	269,831
Long-term
Operating lease liabilities	1,802,494	1,728,686
Financing lease liabilities	313,418	320,600
Total long-term lease liabilities	2,115,912	2,049,286
Total	$ 2,392,420	$ 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	70.00%	69.00%
Finance lease, right-of-use asset, non-real estate assets, percent	30.00%	31.00%
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent	us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtAndCapitalLeaseObligations	us-gaap:LongTermDebtAndCapitalLeaseObligations