Derivatives and Hedging Activities - Narrative (Details)	3 Months Ended			9 Months Ended
	Sep. 30, 2021 USD ($) derivative	Dec. 31, 2020 USD ($) derivative	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) derivative	Sep. 30, 2020 USD ($)
Derivative [Line Items]
Reclassification of previously unrealized losses on interest rate derivatives into net income	$ 99,000		$ 5,441,000	$ 295,000	$ 11,995,000
Gain to be reclassified in next twelve months	400,000			400,000
Cash Flow Hedging [Member]
Derivative [Line Items]
Amount of gain (loss) recognized in income on cash flow hedges	$ 0		3,700,000	$ 0	(81,400,000)
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Number of derivatives held | derivative	0	0		0
Notional amount	$ 900,000,000			$ 900,000,000
Termination of derivative contract		$ 900,000,000
Designated as Hedging Instrument [Member] | Forward Starting Interest Rate Swap [Member]
Derivative [Line Items]
Notional amount	400,000,000			400,000,000
Termination of derivative contract		$ 400,000,000
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Reclassification of previously unrealized losses on interest rate derivatives into net income	$ 100,000		$ 5,400,000	$ 300,000	$ 12,000,000