SECURITIES - Summary of Available For Sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Schedule of Available-for-sale Securities
Amortized Cost	$ 1,376,969	$ 697,906
Gross Unrealized Gain	30,244	37,045
Gross Unrealized Losses	(8,655)	(106)
Fair Value	1,398,558	734,845
U.S. Treasury securities
Schedule of Available-for-sale Securities
Amortized Cost	900
Gross Unrealized Gain	0
Gross Unrealized Losses	0
Fair Value	900
U.S. government sponsored agencies
Schedule of Available-for-sale Securities
Amortized Cost	145,858	36,492
Gross Unrealized Gain	39	56
Gross Unrealized Losses	(2,445)	(61)
Fair Value	143,452	36,487
Mortgage-backed securities: residential
Schedule of Available-for-sale Securities
Amortized Cost	487,157	270,231
Gross Unrealized Gain	4,455	9,289
Gross Unrealized Losses	(4,936)	(17)
Fair Value	486,676	279,503
Mortgage-backed securities: commercial
Schedule of Available-for-sale Securities
Amortized Cost	522	35,877
Gross Unrealized Gain	1	1,004
Gross Unrealized Losses	0	0
Fair Value	523	36,881
State and municipal securities
Schedule of Available-for-sale Securities
Amortized Cost	742,532	355,306
Gross Unrealized Gain	25,749	26,696
Gross Unrealized Losses	(1,274)	(28)
Fair Value	$ 767,007	$ 381,974

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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Amortized cost excluding accrued interest, before allowance for credit loss, of 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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-Publisher FASB
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Amount excluding accrued interest, of 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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