Mortgage Notes Payable, Credit Facilities and Senior Notes - Narrative (Details)		3 Months Ended	6 Months Ended
	Mar. 02, 2023 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 20, 2019 credit_facility_extension	Nov. 10, 2017 USD ($)	Jul. 26, 2016 USD ($)	Dec. 03, 2014 USD ($)	Dec. 09, 2013 USD ($)
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 600,000,000
Number of extension options | credit_facility_extension					2
Extension term	6 months
Commitment fee (percentage)			0.20%
Fronting fee (percentage)		0.125%	0.125%
Credit facility		$ 63,000,000	$ 63,000,000	$ 88,000,000
Net unamortized deferred financing costs		$ 5,800,000	$ 5,800,000	1,000,000
Line of credit facility, interest rate during the period (percentage)		5.90%	5.70%
Remaining borrowing capacity		$ 537,000,000	$ 537,000,000
Revolving Credit Facility | Federal Funds Effective Swap Rate
Debt Instrument [Line Items]
Variable rate (percentage)	0.50%
Revolving Credit Facility | Adjusted Term SOFR
Debt Instrument [Line Items]
Variable rate (percentage)	1.00%
Letter of Credit
Debt Instrument [Line Items]
Letters of credit outstanding, amount		150,000	150,000
Notes Payable
Debt Instrument [Line Items]
Net unamortized deferred financing costs		83,000	83,000	102,000
Long term debt		60,389,000	60,389,000	60,731,000
Term Loan Agreement
Debt Instrument [Line Items]
Principal amount	$ 300,000,000	300,000,000	300,000,000	300,000,000
Additional borrowing capacity	$ 200,000,000
Variable rate (percentage)	1.00%
Net unamortized deferred financing costs		$ 565,000	$ 565,000	747,000
Interest rate during period (percentage)		6.10%	5.80%
Swapped interest rate			5.40%
Remaining borrowing capacity		$ 0	$ 0
Long term debt		300,000,000	300,000,000
Term Loan Agreement | Federal Funds Effective Swap Rate
Debt Instrument [Line Items]
Variable rate (percentage)	0.50%
Term Loan Agreement | SOFR
Debt Instrument [Line Items]
Variable rate (percentage)	0.10%
Term Loan Agreement | Base Rate
Debt Instrument [Line Items]
Variable rate (percentage)	0.00%
Term Loan Agreement | Adjusted Term SOFR
Debt Instrument [Line Items]
Variable rate (percentage)	1.00%
Credit facility including accordion feature | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 1,200,000,000
Senior Notes Due 2027 | Senior Notes
Debt Instrument [Line Items]
Principal amount		250,000,000	250,000,000	250,000,000		$ 250,000,000
Net unamortized deferred financing costs		786,000	786,000	874,000
Interest rate (percentage)						4.19%
Senior Notes Due 2026 | Senior Notes
Debt Instrument [Line Items]
Principal amount		200,000,000	200,000,000	200,000,000			$ 200,000,000
Net unamortized deferred financing costs		250,000	250,000	289,000
Interest rate (percentage)							3.95%
Senior Notes Due 2024 | Senior Notes
Debt Instrument [Line Items]
Principal amount		250,000,000	250,000,000	250,000,000				$ 250,000,000
Net unamortized deferred financing costs		322,000	322,000	432,000
Interest rate (percentage)								4.00%
Senior Notes Due 2023 | Senior Notes
Debt Instrument [Line Items]
Principal amount		250,000,000	250,000,000	250,000,000					$ 250,000,000
Net unamortized deferred financing costs		$ 120,000	$ 120,000	$ 252,000
Interest rate (percentage)									5.00%
Revolving Credit Facility
Debt Instrument [Line Items]
Variable rate (percentage)	0.85%
Revolving Credit Facility | SOFR
Debt Instrument [Line Items]
Variable rate (percentage)	0.10%
Revolving Credit Facility | Base Rate
Debt Instrument [Line Items]
Variable rate (percentage)	0.00%