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Stockholders' Equity - Additional Information (Details) - USD ($)					12 Months Ended
		Mar. 06, 2023	Mar. 08, 2022	Mar. 11, 2021	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Mar. 11, 2024	Dec. 31, 2021	Mar. 08, 2021	Dec. 31, 2020
Termination date of stock repurchase program		Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Common stock issued under dividend reinvestment plan					17,400	26,529
Shares outstanding at end of period	[1]				9,198,175	9,383,132	9,581,536		9,699,695		7,516,423
Stock repurchases, value					$ 3,832,000	$ 4,355,000	$ 3,831,000
4.875% Notes due 2026
Interest Rate					4.875%
Stock Repurchase Program
Stock repurchase program, authorized amount										$ 10,000,000
Period of stock repurchase program				1 year
2022 Stock Repurchase Program
Stock repurchase program, authorized amount			$ 10,000,000
Period of stock repurchase program			1 year
2023 Stock Repurchase Program
Stock repurchase program, authorized amount		$ 10,000,000
Renewed Stock Repurchase Program
Stock repurchase program, authorized amount								$ 10,000,000
2023 Stock Repurchase Program and Renewed Stock Repurchase Program
Stock repurchases, shares					202,357
Stock repurchases, value					$ 3,800,000
2023 Stock Repurchase Program and 2022 Stock Repurchase Program
Stock repurchases, shares						224,933
Stock repurchases, value						$ 4,400,000
[1] Totals may not sum due to rounding.

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