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Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Derivative [Line Items]
Derivative, Notional Amount	$ 3,225,000	$ 3,000,000	$ 3,225,000	$ 3,000,000	$ 3,225,000
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	(14,000)	$ (28,000)	92,000	98,000
Prepaid expenses and other current assets	198,967		198,967		210,212
Other assets	403,902		403,902		363,587
Accrued expenses and other current liabilities	625,967		625,967		584,151
Other liabilities	392,250		392,250		510,663
Interest Rate Derivatives, at Fair Value, Net	183,783		183,783		275,840
Accumulated other comprehensive loss	(94,694)		(94,694)		(118,615)
Interest Rate Swap, June 2018
Derivative [Line Items]
Payments for Derivative Instrument, Financing Activities			28,000	$ 11,000
Interest Rate Swap, June 2018 \| Not Designated as Hedging Instrument
Derivative [Line Items]
Accrued expenses and other current liabilities	63,841		63,841
Other liabilities	119,942		119,942
Interest Rate Swap, January 2019 (unhedged) [Member] \| Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative, Notional Amount	125,000		125,000		125,000
Interest Rate Swap, February 2019 (unhedged) [Member] \| Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative, Notional Amount	300,000		300,000		300,000
Interest Rate Swaps, October 2019 [Member] \| Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative, Notional Amount	2,800,000		2,800,000		2,800,000
Cash Flow Hedging \| Interest Rate Swap, June 2018 \| Designated as Hedging Instrument
Derivative [Line Items]
Accrued expenses and other current liabilities					65,462
Other liabilities					210,378
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Derivative [Line Items]
Accumulated other comprehensive loss	$ (94,000)		$ (94,000)		$ (118,000)