Organization, Basis of Presentation, and Significant Accounting Policies - Income Taxes and Deferred Financing Costs (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Minimum distribution of adjusted taxable income for deducting dividends from federally taxable income (as a percent)	90.00%
Minimum distribution of REIT taxable income for federal income tax exemption (as a percent)	100.00%
Accounting Policies [Line Items]
Income tax expense	$ 10,153,000	$ 14,646,000	$ 5,733,000
Unrecognized tax benefits	$ 0	$ 0
Tax components of common stock dividends declared
Capital gain tax rate (as a percent)	20.00%	20.00%	20.00%
Ordinary income (as a percent)	83.00%	82.00%	55.00%
20% capital gain (as a percent)	11.00%	15.00%	26.00%
Unrecaptured 1250 gain (as a percent)	6.00%	3.00%	19.00%
Total dividends (as a percent)	100.00%	100.00%	100.00%
Unsecured notes
Accounting Policies [Line Items]
Accumulated amortization of deferred finance costs	$ 34,494,000	$ 29,815,000
Secured notes
Accounting Policies [Line Items]
Accumulated amortization of deferred finance costs	2,262,000	2,040,000
Variable rate unsecured credit facility
Accounting Policies [Line Items]
Accumulated amortization of deferred finance costs	$ 14,490,000	$ 11,222,000