SECURITIES - Available-for-sale Securities With Unrealized Loss Positions (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Available-for-sale Securities With Unrealized Loss Positions
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value	$ 350,992	$ 230,138
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(43,905)	(2,934)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	130,965	8,682
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	(28,105)	(283)
Available-for-sale securities with unrealized loss positions, fair value	481,957	238,820
Available-for-sale securities, with unrealized loss positions, unrealized losses	(72,010)	(3,217)
Obligations of the U.S. Treasury
Available-for-sale Securities With Unrealized Loss Positions
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value	20,913	18,886
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(2,195)	(198)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	10,686	0
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	(1,361)	0
Available-for-sale securities with unrealized loss positions, fair value	31,599	18,886
Available-for-sale securities, with unrealized loss positions, unrealized losses	(3,556)	(198)
Obligations of U.S. Government agencies
Available-for-sale Securities With Unrealized Loss Positions
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value	8,486	9,735
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(454)	(264)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	12,903	4,856
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	(2,096)	(144)
Available-for-sale securities with unrealized loss positions, fair value	21,389	14,591
Available-for-sale securities, with unrealized loss positions, unrealized losses	(2,550)	(408)
Bank holding company debt securities
Available-for-sale Securities With Unrealized Loss Positions
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value	25,432	12,969
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(3,512)	(31)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	0	0
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	0	0
Available-for-sale securities with unrealized loss positions, fair value	25,432	12,969
Available-for-sale securities, with unrealized loss positions, unrealized losses	(3,512)	(31)
Obligations Of States And Political Subdivisions Tax Exempt
Available-for-sale Securities With Unrealized Loss Positions
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value	107,565	17,852
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(16,818)	(141)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	13,122	549
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	(3,472)	(7)
Available-for-sale securities with unrealized loss positions, fair value	120,687	18,401
Available-for-sale securities, with unrealized loss positions, unrealized losses	(20,290)	(148)
Obligations Of States And Political Subdivisions Taxable
Available-for-sale Securities With Unrealized Loss Positions
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value	37,480	31,261
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(6,189)	(517)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	20,837	3,277
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	(5,396)	(132)
Available-for-sale securities with unrealized loss positions, fair value	58,317	34,538
Available-for-sale securities, with unrealized loss positions, unrealized losses	(11,585)	(649)
Residential Passthrough Securities
Available-for-sale Securities With Unrealized Loss Positions
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value	66,747	71,451
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(7,746)	(572)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	35,992	0
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	(6,348)	0
Available-for-sale securities with unrealized loss positions, fair value	102,739	71,451
Available-for-sale securities, with unrealized loss positions, unrealized losses	(14,094)	(572)
Residential Collateralized Mortgage Obligations
Available-for-sale Securities With Unrealized Loss Positions
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value	31,957	15,117
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(2,763)	(205)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	7,675	0
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	(1,680)	0
Available-for-sale securities with unrealized loss positions, fair value	39,632	15,117
Available-for-sale securities, with unrealized loss positions, unrealized losses	(4,443)	(205)
Private label commercial mortgage-backed securities
Available-for-sale Securities With Unrealized Loss Positions
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value	4,779
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(14)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	0
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	0
Available-for-sale securities with unrealized loss positions, fair value	4,779
Available-for-sale securities, with unrealized loss positions, unrealized losses	(14)
Commercial Mortgage Backed Securities
Available-for-sale Securities With Unrealized Loss Positions
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value	47,633	52,867
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(4,214)	(1,006)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	29,750	0
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	(7,752)	0
Available-for-sale securities with unrealized loss positions, fair value	77,383	52,867
Available-for-sale securities, with unrealized loss positions, unrealized losses	$ (11,966)	$ (1,006)