Comprehensive Income - Changes in Accumulated Other Comprehensive Income By Component (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 379,772	$ 353,538
Other comprehensive income or loss before reclassifications	860	5,506
Amounts reclassified from accumulated other comprehensive income or loss	(158)	166
Other Comprehensive Income	702	5,672
Ending balance	377,986	363,371
AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(33,416)	(49,655)
Other Comprehensive Income	702	5,672
Ending balance	(32,714)	(43,983)
Net Unrealized Securities Holding Loss on Securities Available-for-Sale Arising During the Period
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(31,648)	(48,841)
Other comprehensive income or loss before reclassifications	(1,530)	6,099
Amounts reclassified from accumulated other comprehensive income or loss	0	0
Other Comprehensive Income	(1,530)	6,099
Ending balance	(33,178)	(42,742)
Unrealized Gain on Cash Flow Swap
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	1,711	4,054
Other comprehensive income or loss before reclassifications	2,390	(593)
Amounts reclassified from accumulated other comprehensive income or loss	(158)	147
Other Comprehensive Income	2,232	(446)
Ending balance	3,943	3,608
Net Actuarial Gain (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(2,839)	(4,467)
Other comprehensive income or loss before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income or loss	(50)	(18)
Other Comprehensive Income	(50)	(18)
Ending balance	(2,889)	(4,485)
Net Prior Service (Cost) Credit
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(640)	(401)
Other comprehensive income or loss before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income or loss	50	37
Other Comprehensive Income	50	37
Ending balance	$ (590)	$ (364)