SECURITIES - Amortized cost and Fair values of securities with gross unrealized gains and losses (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Available-for-sale
Amortized Cost	$ 938,360	$ 899,700
Gross Unrealized Gains	12,796	24,260
Gross Unrealized Losses	(8,988)	(1,091)
Fair Value	942,168	922,869
Held-to-maturity
Amortized Cost	336,185	68,395
Gross Unrealized Gains	2,796	4,064
Gross Unrealized Losses	(2,954)	(18)
Fair Value	336,027	72,441
Total Amortized Cost	1,274,545	968,095
Total Gross Unrealized Gains	15,592	28,324
Total Gross Unrealized Losses	(11,942)	(1,109)
Total Fair Value	1,278,195	995,310
U.S. Treasury
Available-for-sale
Amortized Cost	109,002
Gross Unrealized Gains	328
Gross Unrealized Losses	(354)
Fair Value	108,976
U.S. government agency
Available-for-sale
Amortized Cost	129,269	118,282
Gross Unrealized Gains	1,303	3,720
Gross Unrealized Losses	(2,467)	(9)
Fair Value	128,105	121,993
Held-to-maturity
Amortized Cost	12,349
Gross Unrealized Gains	42
Gross Unrealized Losses	(51)
Fair Value	12,340
Municipal securities
Available-for-sale
Amortized Cost	293,837	265,309
Gross Unrealized Gains	6,144	9,232
Gross Unrealized Losses	(2,904)	(280)
Fair Value	297,077	274,261
Held-to-maturity
Amortized Cost	15,666	22,484
Gross Unrealized Gains	809	1,390
Fair Value	16,475	23,874
Mortgage-backed: Agency residential
Available-for-sale
Amortized Cost	178,236	198,543
Gross Unrealized Gains	2,149	4,871
Gross Unrealized Losses	(919)	(162)
Fair Value	179,466	203,252
Held-to-maturity
Amortized Cost	20,555	13,031
Gross Unrealized Gains	196	452
Gross Unrealized Losses	(102)
Fair Value	20,649	13,483
Mortgage-backed: Agency commercial
Available-for-sale
Amortized Cost	164,875	246,649
Gross Unrealized Gains	1,234	4,651
Gross Unrealized Losses	(2,048)	(534)
Fair Value	164,061	250,766
Held-to-maturity
Amortized Cost	287,615	32,880
Gross Unrealized Gains	1,749	2,222
Gross Unrealized Losses	(2,801)	(18)
Fair Value	286,563	35,084
Corporate
Available-for-sale
Amortized Cost	63,141	70,917
Gross Unrealized Gains	1,638	1,786
Gross Unrealized Losses	(296)	(106)
Fair Value	$ 64,483	$ 72,597

Debt Securities Available For Sale And Held To Maturity Amortized Cost

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Amount of accumulated unrecognized gain on investment in debt security available for sale and held to maturity at amortized cost.

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Amount of accumulated unrecognized loss on investment in debt security available for sale and held to maturity at amortized cost.

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