Derivatives and Hedging Activities - Narrative (Details)	3 Months Ended	12 Months Ended
	Dec. 31, 2020 USD ($) derivative	Dec. 31, 2020 USD ($) derivative	Dec. 31, 2019 USD ($) derivative	Dec. 31, 2018 USD ($)
Derivative [Line Items]
Reclassification of previous unrealized loss on interest rate derivatives into net income (loss)		$ 99,677,000	$ 2,457,000	$ 313,000
Gain (loss) to be reclassified in next twelve months	$ 400,000	400,000
Cash Flow Hedging [Member]
Derivative [Line Items]
Amount of (loss) gain recognized in income on cash flow hedges		(71,500,000)	(29,900,000)	0
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Termination fee	85,400,000
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Notional amount	900,000,000.0	900,000,000.0
Termination of derivative contract	900,000,000.0
Designated as Hedging Instrument [Member] | Forward Starting Interest Rate Swap [Member]
Derivative [Line Items]
Notional amount	400,000,000.0	400,000,000.0
Termination of derivative contract	$ 400,000,000.0
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Reclassification of previous unrealized loss on interest rate derivatives into net income (loss)		$ 99,700,000	$ 2,500,000	$ 300,000
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Number of derivatives held | derivative	0	0	0