Acquisitions Acquisitions - Schedule of Purchase Price Allocation (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Business Acquisition [Line Items]
Fair Value of Investments Applied to Acquisitions	$ 0	$ 2,394
Fair Value of Identifiable Assets Acquired:
Operating Lease Right-of-Use Assets	1,947,665		$ 1,869,101
Operating Lease Liabilities	(1,802,494)		(1,728,686)
Goodwill Initially Recorded	4,421,062		$ 4,485,209
Cash paid for previous acquisition	443
2020 Acquisitions
Business Acquisition [Line Items]
Cash Paid (gross of cash acquired)	124,614
Fair Value of Investments Applied to Acquisitions	27,276
Total Consideration	151,890
Fair Value of Identifiable Assets Acquired:
Cash	6,545
Accounts Receivable, Prepaid Expenses and Other Assets	16,815
Property, Plant and Equipment	45,095
Customer Relationship Intangible Assets	60,846
Operating Lease Right-of-Use Assets	111,251
Debt Assumed	(11,479)
Accounts Payable, Accrued Expenses and Other Liabilities	(8,343)
Operating Lease Liabilities	(111,251)
Deferred Income Taxes	(6,364)
Total Fair Value of Identifiable Net Assets Acquired	103,115
Goodwill Initially Recorded	48,775
Net cash acquired	$ 6,545