Organization, Basis of Presentation, and Significant Accounting Policies - Income Taxes and Deferred Financing Costs (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
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 (benefit)	$ 14,646,000	$ 5,733,000	$ (3,247,000)
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)	82.00%	55.00%	66.00%
20% capital gain (as a percent)	15.00%	26.00%	24.00%
Unrecaptured 1250 gain (as a percent)	3.00%	19.00%	10.00%
Total dividends (as a percent)	100.00%	100.00%	100.00%
Unsecured notes
Accounting Policies [Line Items]
Accumulated amortization of deferred finance costs	$ 29,815,000	$ 23,705,000
Secured notes
Accounting Policies [Line Items]
Accumulated amortization of deferred finance costs	2,040,000	2,300,000
Variable rate unsecured credit facility
Accounting Policies [Line Items]
Accumulated amortization of deferred finance costs	$ 11,222,000	$ 15,187,000