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Debt (Narrative) (Details)
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2022
USD ($)
extensionOption
Jun. 30, 2023
USD ($)
Mar. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
loan
Jan. 31, 2021
USD ($)
Mar. 31, 2015
Mar. 31, 2023
USD ($)
Dec. 31, 2023
USD ($)
property
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Mar. 30, 2022
USD ($)
Jan. 01, 2021
Debt Instrument [Line Items]                        
Debt issuance costs, gross             $ 2,700          
Fannie Mae financing   $ 220,000                    
Deferred financing costs               $ 0 $ 0 $ 1,462    
Proceeds from issuance of senior notes               $ 0 $ 0 396,784    
Debt leverage limit, coupon change, trigger               50.00%        
Interest Rate Swaps, Maturity Date, After June 2020                        
Debt Instrument [Line Items]                        
Interest rate, stated percentage                 1.92%      
$300M Term Loan                        
Debt Instrument [Line Items]                        
Long-term debt $ 300,000   $ 300,000                  
Repayments of debt                 $ 60,000      
$75M Term Loan                        
Debt Instrument [Line Items]                        
Repayments of debt     75,000       $ 20,000          
Deferred debt issuance cost               $ 100        
$100M Term Loan                        
Debt Instrument [Line Items]                        
Basis spread on variable rate         1.85%              
Deferred financing costs                 $ 200 1,900    
Basis point floor             1.35%         0.50%
Term loans, outstanding balance         $ 100,000              
Deferred debt issuance cost                   500    
Private placement notes - unsecured                        
Debt Instrument [Line Items]                        
Repayments of debt               175,000        
Fannie Mae Term Loans                        
Debt Instrument [Line Items]                        
Long-term debt               $ 60,100        
Fannie Mae term loans - secured, non-recourse                        
Debt Instrument [Line Items]                        
Debt instrument, term           10 years            
Deferred financing costs                   1,500    
Interest rate, stated percentage           3.79%            
Properties | property               11        
Number of Fannie Mae term loans | loan       2                
Fannie Mae term loans, balance       $ 17,900                
Fannie Mae term loans, accrued interest       100                
Net book value of real estate pledged toward mortgage               $ 100,900        
FNMA Berkadia Note                        
Debt Instrument [Line Items]                        
Long-term debt               $ 16,100        
Interest rate, stated percentage               4.60%        
Interest Rate Swaps, Maturity Date, After June 2020                        
Debt Instrument [Line Items]                        
Derivative, notional amount       $ 400,000           $ 400,000    
Secured Overnight Financing Rate (SOFR)                        
Debt Instrument [Line Items]                        
Basis spread on variable rate               1.00%        
Fed Funds Effective Rate Overnight Index Swap Rate                        
Debt Instrument [Line Items]                        
Basis spread on variable rate               0.50%        
Minimum                        
Debt Instrument [Line Items]                        
Line of credit facility, commitment fee percentage               0.125%        
Maximum                        
Debt Instrument [Line Items]                        
Line of credit facility, commitment fee percentage               0.30%        
Senior Notes | 2031 Senior Notes - unsecured, net of discount of $2,278 and $2,600                        
Debt Instrument [Line Items]                        
Aggregate principal amount, senior notes         $ 400,000              
Interest rate, stated percentage         3.00%              
Percentage of issue price on face value         99.196%              
Proceeds from issuance of senior notes         $ 392,300              
Revolving Credit Facility | Minimum | Secured Overnight Financing Rate (SOFR)                        
Debt Instrument [Line Items]                        
Basis spread on variable rate 0.725%                      
Revolving Credit Facility | Minimum | Base Rate                        
Debt Instrument [Line Items]                        
Basis spread on variable rate               0.00%        
Revolving Credit Facility | Maximum | Secured Overnight Financing Rate (SOFR)                        
Debt Instrument [Line Items]                        
Basis spread on variable rate 1.40%                      
Revolving Credit Facility | Maximum | Base Rate                        
Debt Instrument [Line Items]                        
Basis spread on variable rate               0.40%        
Revolving Credit Facility | Unsecured Debt                        
Debt Instrument [Line Items]                        
Line of credit facility, maximum borrowing capacity $ 700,000 $ 200,000 $ 700,000               $ 550,000  
Debt instrument, number of extension options | extensionOption 2                      
Debt instrument, extension period 6 months                      
Debt issuance costs, gross               $ 4,500        
Debt instrument, term   2 years                    
Basis point floor 0.10%   0.10%           4.36%      
Unused balance of the unsecured revolving credit facility               $ 455,000        
Revolving Credit Facility | Unsecured Debt | Secured Overnight Financing Rate (SOFR)                        
Debt Instrument [Line Items]                        
Basis spread on variable rate             0.10% 1.05%        
Adjusts basis spread on variable rate               1.25%        
Line of credit facility, interest rate at period end               5.34%