Derivative Instruments and Hedging Activities (Details)	1 Months Ended	12 Months Ended
	Nov. 30, 2016 USD ($)	Dec. 31, 2021 USD ($) instrument	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2017 instrument	Dec. 31, 2016 instrument	Oct. 31, 2016 USD ($)
Derivative [Line Items]
Unsecured debt, net		$ 5,307,196,000	$ 5,607,985,000
Hedge ineffectiveness related to cash flow hedges		9,170,000	(4,148,000)	$ (2,948,000)
Total return swap income		10,774,000	10,733,000	8,446,000
Designated as Hedging Instrument
Derivative [Line Items]
Hedge ineffectiveness related to cash flow hedges		0	0	(200,000)
Not Designated as Hedging Instrument
Derivative [Line Items]
Total return swap income		$ 10,800,000	10,700,000	$ 8,400,000
Interest Rate Swap | Designated as Hedging Instrument
Derivative [Line Items]
Number of derivative instruments held | instrument		5			1	4
Derivative fair value		$ 0	2,400,000
Aggregate carrying value of the interest rate swap contracts		0
Interest Rate Cap | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative notional amount		0	0
Derivative fair value		$ 0	0
Total Return Swap Callable | Not Designated as Hedging Instrument
Derivative [Line Items]
Number of derivative instruments held | instrument		4
Total Return Swap | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative fair value		$ 0	0
Variable Rate Term Loan
Derivative [Line Items]
Unsecured debt, net	$ 350,000,000	0	$ 550,000,000				$ 225,000,000
Debt instrument, term	5 years
Basis spread on rate	0.95%
Variable Rate Term Loan | Interest Rate Swap | Designated as Hedging Instrument
Derivative [Line Items]
Derivative notional amount		175,000,000
Variable rate mortgage notes payable
Derivative [Line Items]
Derivative notional amount		224,400,000
Bond subject to interest rate caps		224,400,000
Mortgage Notes Payable | Total Return Swap Callable | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative notional amount		$ 224,400,000