Earnings Per Share (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) $ / shares shares	Sep. 30, 2024 USD ($) $ / shares shares	Sep. 30, 2025 USD ($) Vote $ / shares shares	Sep. 30, 2024 USD ($) $ / shares shares
Earnings Per Share [Abstract]
Voting rights conversion basis | shares			1
Common Stock
Earnings Per Share [Abstract]
Percentage of earnings assumed to be distributed as dividends in earnings per share calculation (as a percent)			100.00%
Preferential dividend rate (as percent)			105.00%
Number of votes per share | Vote			1
Numerator:
Distributed earnings	$ 4,815	$ 4,842	$ 14,421	$ 14,173
Excess distributions	(420)	(275)	(4,021)	(3,271)
Basic	4,395	4,567	10,400	10,902
Diluted	$ 4,729	$ 4,928	$ 11,196	$ 11,759
Denominator:
Weighted average shares outstanding - basic (in shares) | shares	15,050,000	15,133,000	14,989,000	15,032,000
Assumed conversion of Class A Common Stock (in shares) | shares	1,217,000	1,275,000	1,239,000	1,277,000
Dilutive options, awards and common stock (in shares) | shares	370,000	337,000	348,000	414,000
Total weighted-average diluted Common Stock (in shares) | shares	16,637,000	16,745,000	16,576,000	16,723,000
Earnings Per Share [Abstract]
Basic earnings per share (in dollars per share) | $ / shares	$ 0.29	$ 0.30	$ 0.69	$ 0.73
Diluted earnings per share (in dollars per share) | $ / shares	$ 0.28	$ 0.29	$ 0.68	$ 0.70
Class A Common Stock
Earnings Per Share [Abstract]
Number of votes per share | Vote			10
Numerator:
Distributed earnings	$ 366	$ 383	$ 1,113	$ 1,122
Excess distributions	(32)	(22)	(317)	(265)
Basic	$ 334	$ 361	$ 796	$ 857
Denominator:
Weighted average shares outstanding (in shares) | shares	1,217,000	1,275,000	1,239,000	1,277,000
Earnings Per Share [Abstract]
Basic earnings per share (in dollars per share) | $ / shares	$ 0.27	$ 0.28	$ 0.64	$ 0.67
Diluted earnings per share (in dollars per share) | $ / shares	$ 0.27	$ 0.28	$ 0.64	$ 0.67
Maximum
Earnings Per Share [Abstract]
Percentage of total number of directors (as a percent)			75.00%
Minimum
Earnings Per Share [Abstract]
Percentage of total number of directors (as a percent)			25.00%