Debt and Derivative Instruments (Narrative) (Details) $ in Thousands			3 Months Ended		6 Months Ended
	May 17, 2022 USD ($)	Feb. 03, 2022 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) Property	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Indebtedness includes effects of interest rate swap, weighted average interest rate			4.78%		4.78%		4.79%
Carrying value of debt			$ 842,851		$ 842,851		$ 847,019
Estimated fair value of debt			837,499		837,499		841,313
Outstanding line of credit			705,000		705,000		$ 709,000
Interest expense			10,386	$ 10,806	20,816	$ 21,215
Amount expected to be reclassified from accumulated other comprehensive income (loss) into income in the next twelve months					$ 15,211
Mortgages Payable [Member]
Debt Instrument [Line Items]
Debt, covenant compliance					the Company was current on all of its debt service payments and in compliance with all financial covenants
Weighted Average Years to Maturity					1 year 6 months
Variable Rate Mortgage Loans [Member] | Interest Rate Swap Agreements [Member]
Debt Instrument [Line Items]
Variable rate mortgage loans			26,000		$ 26,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Outstanding line of credit			130,000		$ 130,000
Credit facility, interest rate					7.34%
Credit facility, maturity date		Feb. 03, 2026
Line of credit facility, expiration date, extension period		1 year
Credit facility available for borrowing			70,000		$ 70,000
Revolving Credit Facility [Member] | Lenders [Member]
Debt Instrument [Line Items]
Aggregate amount of commitments		$ 200,000
Term Loan [Member]
Debt Instrument [Line Items]
Incremental amount borrowed under the term loan	$ 300,000
Outstanding line of credit			575,000		$ 575,000
Credit facility, interest rate					4.39%
Credit facility, maturity date		Feb. 03, 2027
Term Loan [Member] | Interest Rate Swap Agreements [Member]
Debt Instrument [Line Items]
Variable rate mortgage loans			525,000		$ 525,000
Credit Facility [Member]
Debt Instrument [Line Items]
Carrying value of debt			705,000		$ 705,000
Number of properties pledged as collateral | Property					47
Debt, covenant compliance					the Company was in compliance with all financial covenants related to the Credit Facility as amended.
Minimum [Member] | Revolving Credit Facility [Member] | Lenders [Member]
Debt Instrument [Line Items]
Aggregate amount of commitments		$ 350,000
Number of unencumbered properties | Property					15
Unencumbered pool value					$ 300,000
Minimum [Member] | Term Loan [Member] | Lenders [Member]
Debt Instrument [Line Items]
Aggregate amount of term loan commitments		150,000
Maximum [Member]
Debt Instrument [Line Items]
Credit facility available for borrowing			$ 70,000		$ 70,000
Maximum [Member] | Revolving Credit Facility [Member] | Lenders [Member]
Debt Instrument [Line Items]
Aggregate amount of commitments		475,000
Periodic aggregate commitment for credit facility		1,200,000
Maximum [Member] | Term Loan [Member] | Lenders [Member]
Debt Instrument [Line Items]
Aggregate amount of term loan commitments		$ 275,000