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SECURITIES - Available-for-sale Securities With Unrealized Loss Positions (Details) - USD ($)	Jun. 30, 2023	Dec. 31, 2022
Available-for-sale Securities With Unrealized Loss Positions
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value	$ 56,574,000	$ 297,304,000
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(2,167,000)	(28,730,000)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	385,178,000	184,052,000
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	(59,515,000)	(35,352,000)
Available-for-sale securities with unrealized loss positions, fair value	441,752,000	481,356,000
Available-for-sale securities, with unrealized loss positions, unrealized losses	(61,682,000)	(64,082,000)
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	0	20,192,000
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	0	(1,939,000)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	30,743,000	11,644,000
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	(3,188,000)	(1,391,000)
Available-for-sale securities with unrealized loss positions, fair value	30,743,000	31,836,000
Available-for-sale securities, with unrealized loss positions, unrealized losses	(3,188,000)	(3,330,000)
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	6,315,000	8,509,000
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(334,000)	(430,000)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	14,237,000	12,921,000
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	(2,013,000)	(2,078,000)
Available-for-sale securities with unrealized loss positions, fair value	20,552,000	21,430,000
Available-for-sale securities, with unrealized loss positions, unrealized losses	(2,347,000)	(2,508,000)
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	0	14,248,000
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	0	(1,697,000)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	23,325,000	11,138,000
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	(5,623,000)	(1,862,000)
Available-for-sale securities with unrealized loss positions, fair value	23,325,000	25,386,000
Available-for-sale securities, with unrealized loss positions, unrealized losses	(5,623,000)	(3,559,000)
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	11,923,000	106,204,000
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(306,000)	(11,023,000)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	97,304,000	15,153,000
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	(12,016,000)	(2,822,000)
Available-for-sale securities with unrealized loss positions, fair value	109,227,000	121,357,000
Available-for-sale securities, with unrealized loss positions, unrealized losses	(12,322,000)	(13,845,000)
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	2,657,000	28,901,000
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(93,000)	(4,739,000)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	53,045,000	27,761,000
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	(9,920,000)	(6,937,000)
Available-for-sale securities with unrealized loss positions, fair value	55,702,000	56,662,000
Available-for-sale securities, with unrealized loss positions, unrealized losses	(10,013,000)	(11,676,000)
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	14,150,000	45,410,000
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(667,000)	(4,226,000)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	78,645,000	54,531,000
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	(11,565,000)	(8,615,000)
Available-for-sale securities with unrealized loss positions, fair value	92,795,000	99,941,000
Available-for-sale securities, with unrealized loss positions, unrealized losses	(12,232,000)	(12,841,000)
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	2,780,000	28,670,000
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(101,000)	(2,042,000)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	33,117,000	11,626,000
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	(4,446,000)	(2,530,000)
Available-for-sale securities with unrealized loss positions, fair value	35,897,000	40,296,000
Available-for-sale securities, with unrealized loss positions, unrealized losses	(4,547,000)	(4,572,000)
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	10,755,000	40,408,000
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(519,000)	(2,585,000)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	54,762,000	39,278,000
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	(10,744,000)	(9,117,000)
Available-for-sale securities with unrealized loss positions, fair value	65,517,000	79,686,000
Available-for-sale securities, with unrealized loss positions, unrealized losses	(11,263,000)	(11,702,000)
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	7,994,000	4,762,000
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(147,000)	(49,000)
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	7,994,000	4,762,000
Available-for-sale securities, with unrealized loss positions, unrealized losses	$ (147,000)	$ (49,000)

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