Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	[1]	Voting and Nonvoting Common Stock	Common Stock Voting and Nonvoting Common Stock	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	[1]	Accumulated Other Comprehensive Loss
Balance, beginning of period at Dec. 31, 2022	$ 364,974	$ (4,491)			$ 192,935	$ 205,675	$ (4,491)		$ (33,636)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,274					4,274
Other comprehensive income (loss)	(7,561)								(7,561)
Dividends declared	(1,602)					(1,602)
Recognition of the fair value of share-based compensation	873				873
Repurchased shares of common stock	(8,535)				(8,535)
Excise tax on repurchase of common stock	(85)				(85)
Deferred stock rights and restricted stock units issued in lieu of cash dividends payable on outstanding deferred stock rights and restricted stock units	3				3
Common stock redeemed for the net settlement of share-based awards	(106)				(106)
Balance, end of period at Sep. 30, 2023	347,744				185,085	203,856			(41,197)
Balance, beginning of period at Jun. 30, 2023	354,332				186,545	200,973			(33,186)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,409					3,409
Other comprehensive income (loss)	(8,011)								(8,011)
Dividends declared	(526)					(526)
Recognition of the fair value of share-based compensation	386				386
Repurchased shares of common stock	(1,828)				(1,828)
Excise tax on repurchase of common stock	(18)			$ (18)
Balance, end of period at Sep. 30, 2023	347,744				185,085	203,856			(41,197)
Balance, beginning of period at Dec. 31, 2023	362,795				184,700	207,470			(29,375)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	17,946					17,946
Other comprehensive income (loss)	5,049								5,049
Dividends declared	(1,592)					(1,592)
Recognition of the fair value of share-based compensation	1,356				1,356
Repurchased shares of common stock	(283)				(283)
Excise tax on repurchase of common stock	(3)				(3)
Deferred stock rights and restricted stock units issued in lieu of cash dividends payable on outstanding deferred stock rights and restricted stock units	3				3
Common stock redeemed for the net settlement of share-based awards	(142)				(142)
Balance, end of period at Sep. 30, 2024	385,129				185,631	223,824			(24,326)
Balance, beginning of period at Jun. 30, 2024	371,953				185,175	217,365			(30,587)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,990					6,990
Other comprehensive income (loss)	6,261								6,261
Dividends declared	(531)					(531)
Recognition of the fair value of share-based compensation	454				454
Deferred stock rights and restricted stock units issued in lieu of cash dividends payable on outstanding deferred stock rights and restricted stock units	2				2
Balance, end of period at Sep. 30, 2024	$ 385,129				$ 185,631	$ 223,824			$ (24,326)

[1] Reflects the impact of adopting Accounting Standards Update (“ASU”) 2016-13.