Accumulated Other Comprehensive (Loss) Income - Components of Accumulated Other Comprehensive (Loss) Income, Net of Taxes (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning balance	$ 887,301	$ 839,208
Other comprehensive income	11,004	8,731
Reclassification adjustment recorded in earnings	1,352	292
Ending balance	933,219	877,071
Net Unrealized Losses on Available-for-Sale Investment Securities
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning balance	(35,117)	(34,321)
Other comprehensive income	10,916	6,986
Ending balance	(24,201)	(27,335)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning balance	(2,422)	(4,566)
Other comprehensive income	0	1,397
Reclassification adjustment recorded in earnings	1,352	292
Ending balance	(1,070)	(2,877)
Net Change Related to Defined Benefit Pension Plans
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning balance	(6,453)	(11,759)
Other comprehensive income	88	348
Ending balance	(6,365)	(11,411)
Accumulated Other Comprehensive Loss
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning balance	(43,992)	(50,646)
Ending balance	$ (31,636)	$ (41,623)

Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.

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