MARKETABLE SECURITIES - Schedule of Amortized Cost and Fair Value of Securities Available for Sale and Held to Maturity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Available for sale:
Available-for-sale debt securities, amortized cost basis	$ 341,628	$ 363,097
Gross Unrealized Gain	3,388	17,794
Gross Unrealized Loss	2,810	96
Estimated Fair Value	342,206	380,795
Held to maturity:
Amortized Cost	184,263	0
Gross Unrealized Gains	8,364
Gross Unrealized Losses	155
Estimated Fair Value	192,472
U.S. government agencies
Available for sale:
Available-for-sale debt securities, amortized cost basis	10,013
Gross Unrealized Gain	0
Gross Unrealized Loss	42
Estimated Fair Value	9,971
Corporate bonds
Available for sale:
Available-for-sale debt securities, amortized cost basis	35,080	29,608
Gross Unrealized Gain	940	1,382
Gross Unrealized Loss	85	8
Estimated Fair Value	35,935	30,982
Mortgage-backed securities
Available for sale:
Available-for-sale debt securities, amortized cost basis	221,610	104,210
Gross Unrealized Gain	1,477	3,041
Gross Unrealized Loss	1,779	87
Estimated Fair Value	221,308	107,164
Held to maturity:
Amortized Cost	2,953
Gross Unrealized Gains	0
Gross Unrealized Losses	37
Estimated Fair Value	2,916
Collateralized mortgage obligations
Available for sale:
Available-for-sale debt securities, amortized cost basis	74,925	64,611
Gross Unrealized Gain	971	2,335
Gross Unrealized Loss	904	1
Estimated Fair Value	74,992	66,945
Municipal securities
Available for sale:
Available-for-sale debt securities, amortized cost basis		164,668
Gross Unrealized Gain		11,036
Gross Unrealized Loss		0
Estimated Fair Value		$ 175,704
Held to maturity:
Amortized Cost	181,310
Gross Unrealized Gains	8,364
Gross Unrealized Losses	118
Estimated Fair Value	$ 189,556

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 allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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