Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands											12 Months Ended
	Feb. 23, 2022	Feb. 18, 2022	Jan. 22, 2022	Jan. 19, 2022	Jan. 14, 2022	Jan. 11, 2022	Jan. 06, 2022	Jan. 05, 2022	Jan. 04, 2022	Jan. 01, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 07, 2021
Subsequent Event [Line Items]
Total principal balances											$ 957,387	$ 962,812
Notional amount											1,073,587	874,606
Aggregate cash dividends and distributions, paid											$ 58,713	$ 47,603	$ 61,504
Dividend declared (in dollars per share)											$ 0.64	$ 0.44	$ 0.84
Harbor Point Parcel 3 Partnership
Subsequent Event [Line Items]
Outstanding letters of credit														$ 15,000
Not Designated as Hedging Instrument
Subsequent Event [Line Items]
Notional amount											$ 449,579	$ 200,000
Common stock
Subsequent Event [Line Items]
Aggregate cash dividends and distributions, paid											$ 39,300	$ 25,300	$ 45,400
Series A Cumulative Redeemable Preferred Stock
Subsequent Event [Line Items]
Preferred stock dividends declared (in dollars per share)											$ 1.687500	$ 1.687500	$ 0.970315
Interest rate caps | Not Designated as Hedging Instrument
Subsequent Event [Line Items]
Notional amount											$ 399,579	$ 150,000
Unsecured Debt
Subsequent Event [Line Items]
Total principal balances											210,000	215,000
Secured Debt
Subsequent Event [Line Items]
Total principal balances											747,387	747,812
Secured Debt | Delray Beach Plaza
Subsequent Event [Line Items]
Total principal balances											14,039	0
Senior unsecured revolving credit facility | Unsecured Debt
Subsequent Event [Line Items]
Total principal balances											$ 5,000	$ 10,000
Subsequent Event
Subsequent Event [Line Items]
Dividend declared (in dollars per share)	$ 0.17
Subsequent Event | Exelon Building
Subsequent Event [Line Items]
Membership interest acquired (in percent)					79.00%
Economic interest acquired (in percent)					11.00%
Payments to acquire real estate held-for-investment					$ 92,200
Loan issued to seller					12,800
Acquisition, assumption of debt					156,100
Debt, face value					$ 175,000
Subsequent Event | Harbor Point Parcel 3 Partnership
Subsequent Event [Line Items]
Payments to acquire equity method investments								$ 2,600
Outstanding letters of credit									$ 15,000
Subsequent Event | Interlock Commercial | Mezzanine Loan
Subsequent Event [Line Items]
Paydown received on note receivable	$ 13,500
Subsequent Event | Ten Tryon Project
Subsequent Event [Line Items]
Interest acquired (in percent)					20.00%
Acquisition, cash consideration					$ 3,900
Subsequent Event | Public Offering
Subsequent Event [Line Items]
Number of shares issued in public offering						4,025,000
Issuance of common stock, price per share (in dollars per share)						$ 14.45
Net proceeds after offering costs and commissions from sale of shares						$ 58,000
Subsequent Event | Common stock
Subsequent Event [Line Items]
Aggregate cash dividends and distributions, paid							$ 10,700
Subsequent Event | Class A units
Subsequent Event [Line Items]
Aggregate cash dividends and distributions, paid							$ 3,500
Subsequent Event | Common Class A | Stock Issuance - Shares From Existing Shareholder
Subsequent Event [Line Items]
Number of shares issued in public offering										12,149
Subsequent Event | Series A Cumulative Redeemable Preferred Stock
Subsequent Event [Line Items]
Aggregate cash dividends and distributions, paid					2,900
Preferred stock dividends declared (in dollars per share)	$ 0.421875
Subsequent Event | Secured Debt | Delray Beach Plaza
Subsequent Event [Line Items]
Extinguishment of debt				$ 14,100
Subsequent Event | Construction Loans
Subsequent Event [Line Items]
Construction loan borrowings			$ 8,600
Subsequent Event | Senior unsecured revolving credit facility | Unsecured Debt
Subsequent Event [Line Items]
Repayments of credit facility		$ 22,000
Proceeds from lines of credit					$ 50,000				$ 25,000
Total principal balances		$ 58,000
Subsequent Event | BSBY | Interest rate caps | Not Designated as Hedging Instrument
Subsequent Event [Line Items]
Notional amount						$ 175,000
Strike Rate						4.00%
Premium paid						$ 200
Subsequent Event | Bloomberg Short-Term Bank Yield | Exelon Building
Subsequent Event [Line Items]
Stated interest rate, basis spread on variable rate					1.50%