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Investment Securities - Amortized, Gross Unrealized Gains and Losses, and Fair Value on Investment Securities, Available for Sale and Held to Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Investment Securities Holdings by Classification, Type, and Maturity [Line Items]
Available for Sale, Amortized Cost	$ 674,108	$ 835,592
Available for Sale, Gross Unrealized Gains	2,305	1,085
Available for Sale, Gross Unrealized Losses	(45,182)	(72,283)
Available for Sale, Fair Value	631,231	764,394
Held-to-Maturity, Amortized Cost	(681,626)	(703,285)
Held to Maturity, Gross Unrecognized Gains	110	27
Held to Maturity, Gross Unrecognized Losses	(53,687)	(79,860)
Investment Securities, Held to Maturity, Fair Value	628,049	623,452
U.S. government and agency securities
Investment Securities Holdings by Classification, Type, and Maturity [Line Items]
Available for Sale, Amortized Cost	13,276	14,934
Available for Sale, Gross Unrealized Gains	0	0
Available for Sale, Gross Unrealized Losses	(1,634)	(2,390)
Available for Sale, Fair Value	11,642	12,544
Held-to-Maturity, Amortized Cost	(151,297)	(151,216)
Held to Maturity, Gross Unrecognized Gains	0	0
Held to Maturity, Gross Unrecognized Losses	(21,846)	(28,874)
Investment Securities, Held to Maturity, Fair Value	129,451	122,342
Municipal securities
Investment Securities Holdings by Classification, Type, and Maturity [Line Items]
Available for Sale, Amortized Cost	59,581	61,169
Available for Sale, Gross Unrealized Gains	19	12
Available for Sale, Gross Unrealized Losses	(8,403)	(10,239)
Available for Sale, Fair Value	51,197	50,942
Residential CMO and MBS(1)
Investment Securities Holdings by Classification, Type, and Maturity [Line Items]
Available for Sale, Amortized Cost	321,733	407,520
Available for Sale, Gross Unrealized Gains	1,487	711
Available for Sale, Gross Unrealized Losses	(24,483)	(38,900)
Available for Sale, Fair Value	298,737	369,331
Held-to-Maturity, Amortized Cost	(224,654)	(244,309)
Held to Maturity, Gross Unrecognized Gains	88	0
Held to Maturity, Gross Unrecognized Losses	(10,188)	(18,563)
Investment Securities, Held to Maturity, Fair Value	214,554	225,746
Commercial CMO and MBS(1)
Investment Securities Holdings by Classification, Type, and Maturity [Line Items]
Available for Sale, Amortized Cost	265,917	330,249
Available for Sale, Gross Unrealized Gains	696	134
Available for Sale, Gross Unrealized Losses	(10,618)	(20,642)
Available for Sale, Fair Value	255,995	309,741
Held-to-Maturity, Amortized Cost	(305,675)	(307,760)
Held to Maturity, Gross Unrecognized Gains	22	27
Held to Maturity, Gross Unrecognized Losses	(21,653)	(32,423)
Investment Securities, Held to Maturity, Fair Value	284,044	275,364
Corporate obligations
Investment Securities Holdings by Classification, Type, and Maturity [Line Items]
Available for Sale, Amortized Cost	7,000	11,700
Available for Sale, Gross Unrealized Gains	63	181
Available for Sale, Gross Unrealized Losses	(44)	(111)
Available for Sale, Fair Value	7,019	11,770
Other asset-backed securities
Investment Securities Holdings by Classification, Type, and Maturity [Line Items]
Available for Sale, Amortized Cost	6,601	10,020
Available for Sale, Gross Unrealized Gains	40	47
Available for Sale, Gross Unrealized Losses	0	(1)
Available for Sale, Fair Value	$ 6,641	$ 10,066

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- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity).

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