INVESTMENT SECURITIES - Available-for-Sale Securities Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Estimated Fair Value
Less Than 12 Months	$ 183,951	$ 688,212
12 Months or More	246,349	27,099
Total	430,300	715,311
Unrealized Losses
Less Than 12 Months	(13,575)	(11,044)
12 Months or More	(44,251)	(865)
Total	(57,826)	(11,909)
U.S. treasury securities
Estimated Fair Value
Less Than 12 Months	1,377	87,302
12 Months or More	245	0
Total	1,622	87,302
Unrealized Losses
Less Than 12 Months	(17)	(1,087)
12 Months or More	(5)	0
Total	(22)	(1,087)
U.S. agency
Estimated Fair Value
Less Than 12 Months	3,221	10,969
12 Months or More	1,364	0
Total	4,585	10,969
Unrealized Losses
Less Than 12 Months	(257)	(140)
12 Months or More	(193)	0
Total	(450)	(140)
Asset backed securities
Estimated Fair Value
Less Than 12 Months	10,780
12 Months or More	19,208
Total	29,988
Unrealized Losses
Less Than 12 Months	(319)
12 Months or More	(1,161)
Total	(1,480)
State, county and municipal securities
Estimated Fair Value
Less Than 12 Months	29,284	180,551
12 Months or More	75,472	5,970
Total	104,756	186,521
Unrealized Losses
Less Than 12 Months	(3,629)	(3,131)
12 Months or More	(17,734)	(225)
Total	(21,363)	(3,356)
Corporate debt securities
Estimated Fair Value
Less Than 12 Months	17,258	31,977
12 Months or More	30,651	0
Total	47,909	31,977
Unrealized Losses
Less Than 12 Months	(1,463)	(265)
12 Months or More	(3,857)	0
Total	(5,320)	(265)
Mortgage-backed securities
Estimated Fair Value
Less Than 12 Months	122,031	377,413
12 Months or More	119,409	21,129
Total	241,440	398,542
Unrealized Losses
Less Than 12 Months	(7,890)	(6,421)
12 Months or More	(21,301)	(640)
Total	$ (29,191)	$ (7,061)