INVESTMENTS - Investments with Unrealized Losses Policy (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Fair Value
Securities available-for-sale, Unrealized loss position, Fair Value, Less than 12 Months	$ 181,670	$ 121,502
Securities available-for-sale, Unrealized loss position, Fair Value, 12 Months or Longer	43,459	27,169
Securities available-for-sale, Unrealized loss position, Fair Value	225,129	148,671
Securities held-to-maturity, Unrealized loss position, Fair Value, Less than 12 Months	972
Securities held-to-maturity, Unrealized loss position, Fair Value	972
Total securities, Unrealized loss position, Fair Value, Less than 12 Months	182,642
Total securities, Unrealized loss position, Fair Value, 12 Months or Longer	43,459
Total securities, Unrealized loss position, Fair Value	226,101
Unrealized Losses
Securities available-for-sale, Unrealized loss position, Unrealized losses, Less than 12 Months	(16,315)	(2,752)
Securities available-for-sale, Unrealized loss position, Unrealized losses, 12 Months or Longer	(5,797)	(1,373)
Securities available-for-sale, Unrealized losses	(22,112)	(4,125)
Securities held-to-maturity, Unrealized loss position, Unrealized losses, Less than 12 Months	(28)
Securities held-to-maturity, Unrealized losses	(28)
Unrealized loss position, Less than 12 Months, Unrealized Losses	(16,343)
Unrealized loss position, 12 Months or Longer, Unrealized Losses	(5,797)
Unrealized loss position, Unrealized Losses	(22,140)
U.S. agency securities
Fair Value
Securities available-for-sale, Unrealized loss position, Fair Value, Less than 12 Months	12,749	13,125
Securities available-for-sale, Unrealized loss position, Fair Value, 12 Months or Longer	3,196	3,752
Securities available-for-sale, Unrealized loss position, Fair Value	15,945	16,877
Unrealized Losses
Securities available-for-sale, Unrealized loss position, Unrealized losses, Less than 12 Months	(1,485)	(105)
Securities available-for-sale, Unrealized loss position, Unrealized losses, 12 Months or Longer	(771)	(213)
Securities available-for-sale, Unrealized losses	(2,256)	(318)
Corporate securities
Fair Value
Securities available-for-sale, Unrealized loss position, Fair Value, 12 Months or Longer	4,226	5,476
Securities available-for-sale, Unrealized loss position, Fair Value	4,226	5,476
Securities held-to-maturity, Unrealized loss position, Fair Value, Less than 12 Months	972
Securities held-to-maturity, Unrealized loss position, Fair Value	972
Unrealized Losses
Securities available-for-sale, Unrealized loss position, Unrealized losses, 12 Months or Longer	(774)	(524)
Securities available-for-sale, Unrealized losses	(774)	(524)
Securities held-to-maturity, Unrealized loss position, Unrealized losses, Less than 12 Months	(28)
Securities held-to-maturity, Unrealized losses	(28)
Municipal bonds
Fair Value
Securities available-for-sale, Unrealized loss position, Fair Value, Less than 12 Months	84,565	72,098
Securities available-for-sale, Unrealized loss position, Fair Value, 12 Months or Longer	31,746	14,116
Securities available-for-sale, Unrealized loss position, Fair Value	116,311	86,214
Unrealized Losses
Securities available-for-sale, Unrealized loss position, Unrealized losses, Less than 12 Months	(8,963)	(1,961)
Securities available-for-sale, Unrealized loss position, Unrealized losses, 12 Months or Longer	(4,128)	(560)
Securities available-for-sale, Unrealized losses	(13,091)	(2,521)
Mortgage-backed securities
Fair Value
Securities available-for-sale, Unrealized loss position, Fair Value, Less than 12 Months	75,898	33,291
Securities available-for-sale, Unrealized loss position, Fair Value, 12 Months or Longer	4,291	3,825
Securities available-for-sale, Unrealized loss position, Fair Value	80,189	37,116
Unrealized Losses
Securities available-for-sale, Unrealized loss position, Unrealized losses, Less than 12 Months	(5,600)	(620)
Securities available-for-sale, Unrealized loss position, Unrealized losses, 12 Months or Longer	(124)	(76)
Securities available-for-sale, Unrealized losses	(5,724)	(696)
U.S. Small Business Administration securities
Fair Value
Securities available-for-sale, Unrealized loss position, Fair Value, Less than 12 Months	8,458	2,988
Securities available-for-sale, Unrealized loss position, Fair Value	8,458	2,988
Unrealized Losses
Securities available-for-sale, Unrealized loss position, Unrealized losses, Less than 12 Months	(267)	(66)
Securities available-for-sale, Unrealized losses	$ (267)	$ (66)