Income Taxes - Current and Deferred Components of Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Federal income tax
Current									$ 7,011	$ 7,912	$ 6,058
Deferred									(1,360)	(127)	999
Federal income tax expense									5,651	7,785	7,057
State franchise tax									533	611	587
Income tax expense	$ 1,411	$ 1,565	$ 1,535	$ 1,673	$ 1,973	$ 2,217	$ 2,159	$ 2,047	$ 6,184	$ 8,396	$ 7,644