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INVESTMENT SECURITIES - Summary of Amortized Cost and Fair Value and Corresponding Amounts of Gross Unrealized Gains and Losses (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 563,278	$ 466,806
Gross Unrealized Gains	490	9,487
Gross Unrealized Losses	50,040	3,855
Fair Value	513,728	472,438
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	20,070	20,084
Gross Unrealized Gains	0	0
Gross Unrealized Losses	2,779	382
Fair Value	17,291	19,702
U.S. government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,907
Gross Unrealized Gains	228
Gross Unrealized Losses	0
Fair Value	5,135
States and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	225,825	185,437
Gross Unrealized Gains	19	8,606
Gross Unrealized Losses	28,430	673
Fair Value	197,414	193,370
GSE residential MBSs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	63,778	41,260
Gross Unrealized Gains	0	44
Gross Unrealized Losses	4,376	578
Fair Value	59,402	40,726
GSE residential CMOs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	75,446	66,430
Gross Unrealized Gains	0	436
Gross Unrealized Losses	7,068	944
Fair Value	68,378	65,922
Non-agency CMOs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	42,298	30,676
Gross Unrealized Gains	243	0
Gross Unrealized Losses	2,783	978
Fair Value	39,758	29,698
Asset-backed
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	130,577	122,520
Gross Unrealized Gains	0	401
Gross Unrealized Losses	4,604	300
Fair Value	125,973	122,621
Other
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	377	399
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	$ 377	$ 399

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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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