Acquisitions - Schedule of Purchase Price Allocation (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Cash Paid (gross of cash acquired)	$ 45,000
Fair Value of Identifiable Assets Acquired and Liabilities Assumed:
Operating Lease Right-of-Use Assets	2,342,197	$ 2,342,197	$ 2,196,502
Operating Lease Liabilities	(2,186,625)	(2,186,625)	(2,044,598)
Goodwill Initially Recorded	4,508,754	$ 4,508,754	$ 4,557,609
Customer Relationships
Fair Value of Identifiable Assets Acquired and Liabilities Assumed:
Acquired finite-lived intangible assets, weighted average useful life		12 years
2020 Acquisitions
Business Acquisition [Line Items]
Cash Paid (gross of cash acquired)		$ 44,760
Fair Value of Noncontrolling Interest	2,567	2,567
Purchase Price Holdbacks and Other		199
Total Consideration		47,526
Fair Value of Identifiable Assets Acquired and Liabilities Assumed:
Cash	9,037	9,037
Accounts Receivable, Prepaid Expenses and Other Assets	8,487	8,487
Property, Plant and Equipment	8,375	8,375
Customer Relationship Intangible Assets	19,010	19,010
Operating Lease Right-of-Use Assets	40,057	40,057
Debt Assumed	(1,367)	(1,367)
Accounts Payable, Accrued Expenses and Other Liabilities	(6,507)	(6,507)
Operating Lease Liabilities	(40,057)	(40,057)
Deferred Income Taxes	(4,424)	(4,424)
Total Fair Value of Identifiable Net Assets Acquired	32,611	32,611
Goodwill Initially Recorded	$ 14,915	$ 14,915