Mortgage Notes Payable, Credit Facilities and Senior Notes - Carrying Value of Debt (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021	Dec. 20, 2019	Nov. 10, 2017	Jul. 26, 2016	Dec. 03, 2014	Dec. 09, 2013
Debt Instrument [Line Items]
Senior Notes	$ 945,632,000	$ 945,231,000
Term Loan Agreement
Debt Instrument [Line Items]
Principal amount	300,000,000	300,000,000	$ 300,000,000
Net unamortized deferred financing costs	(1,020,000)	(1,111,000)
Term loan	298,980,000	298,889,000
Senior Notes | Senior Notes Due 2027
Debt Instrument [Line Items]
Principal amount	250,000,000	250,000,000		$ 250,000,000
Net unamortized deferred financing costs	(1,006,000)	(1,050,000)
Senior Notes	248,994,000	248,950,000
Senior Notes | Senior Notes Due 2026
Debt Instrument [Line Items]
Principal amount	200,000,000	200,000,000			$ 200,000,000
Net unamortized deferred financing costs	(346,000)	(366,000)
Senior Notes	199,654,000	199,634,000
Senior Notes | Senior Notes Due 2024
Debt Instrument [Line Items]
Principal amount	250,000,000	250,000,000				$ 250,000,000
Unamortized debt discount	(1,093,000)	(1,188,000)
Net unamortized deferred financing costs	(597,000)	(652,000)
Senior Notes	248,310,000	248,160,000
Senior Notes | Senior Notes Due 2023
Debt Instrument [Line Items]
Principal amount	250,000,000	250,000,000					$ 250,000,000
Unamortized debt discount	(877,000)	(998,000)
Net unamortized deferred financing costs	(449,000)	(515,000)
Senior Notes	$ 248,674,000	$ 248,487,000