Comprehensive Income (Loss), Net of Tax - Changes in Accumulated Other Comprehensive Income By Component (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 379,772	$ 353,538	$ 371,186
Other comprehensive income (loss) before reclassifications	14,595	8,897	(50,364)
Amounts reclassified from accumulated other comprehensive income (loss)	368	7,342	362
Other Comprehensive Income (Loss)	14,963	16,239	(50,002)
Ending balance	400,901	379,772	353,538
Accumulated Other Comprehensive Income (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(33,416)	(49,655)	347
Other Comprehensive Income (Loss)	14,963	16,239	(50,002)
Ending balance	(18,453)	(33,416)	(49,655)
Unrealized Gains And Losses On Available-for-Sale Securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(31,648)	(48,841)	(614)
Other comprehensive income (loss) before reclassifications	2,101	10,441	(48,227)
Amounts reclassified from accumulated other comprehensive income (loss)	2,255	6,752	0
Other Comprehensive Income (Loss)	4,356	17,193	(48,227)
Ending balance	(27,292)	(31,648)	(48,841)
Unrealized Gain on Cash Flow Swap
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	1,711	4,054	1,320
Other comprehensive income (loss) before reclassifications	4,823	(2,900)	2,582
Amounts reclassified from accumulated other comprehensive income (loss)	(1,857)	557	152
Other Comprehensive Income (Loss)	2,966	(2,343)	2,734
Ending balance	4,677	1,711	4,054
Net Actuarial Gain (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(2,839)	(4,467)	639
Other comprehensive income (loss) before reclassifications	7,998	1,747	(5,147)
Amounts reclassified from accumulated other comprehensive income (loss)	(232)	(119)	41
Other Comprehensive Income (Loss)	7,766	1,628	(5,106)
Ending balance	4,927	(2,839)	(4,467)
Amortization of Net Retirement Plan Prior Service Cost
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(640)	(401)	(998)
Other comprehensive income (loss) before reclassifications	(327)	(391)	428
Amounts reclassified from accumulated other comprehensive income (loss)	202	152	169
Other Comprehensive Income (Loss)	(125)	(239)	597
Ending balance	$ (765)	$ (640)	$ (401)