SECURITIES - Continuous Unrealized Loss Position (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Securities available-for-sale, Fair Value [Abstract]
Total	$ 0
Pass-through mortgage-backed securities ("MBS") issued by government sponsored entities ("GSEs")
Securities available-for-sale, Fair Value [Abstract]
Less than 12 Consecutive Months	50,813,000	$ 422,634,000
12 Consecutive Months or Longer	190,427,000	4,748,000
Total	241,240,000	427,382,000
Securities available-for-sale, Unrealized Losses [Abstract]
Less than 12 Consecutive Months	2,010,000	6,333,000
12 Consecutive Months or Longer	29,524,000	233,000
Total	31,534,000	6,566,000
Treasury Securities
Securities available-for-sale, Fair Value [Abstract]
Less than 12 Consecutive Months		244,769,000
12 Consecutive Months or Longer	227,256,000
Total	227,256,000	244,769,000
Securities available-for-sale, Unrealized Losses [Abstract]
Less than 12 Consecutive Months		3,147,000
12 Consecutive Months or Longer	19,643,000
Total	19,643,000	3,147,000
State and municipal obligations
Securities available-for-sale, Fair Value [Abstract]
Less than 12 Consecutive Months	10,848,000	18,887,000
12 Consecutive Months or Longer	22,681,000
Total	33,529,000	18,887,000
Securities available-for-sale, Unrealized Losses [Abstract]
Less than 12 Consecutive Months	174,000	302,000
12 Consecutive Months or Longer	2,847,000
Total	3,021,000	302,000
Agency Notes
Securities available-for-sale, Fair Value [Abstract]
Less than 12 Consecutive Months		58,607,000
12 Consecutive Months or Longer		21,647,000
Total		80,254,000
Securities available-for-sale, Unrealized Losses [Abstract]
Less than 12 Consecutive Months		1,369,000
12 Consecutive Months or Longer		853,000
Total		2,222,000
Corporate Notes
Securities available-for-sale, Fair Value [Abstract]
Less than 12 Consecutive Months	110,707,000	37,620,000
12 Consecutive Months or Longer	50,116,000
Total	160,823,000	37,620,000
Securities available-for-sale, Unrealized Losses [Abstract]
Less than 12 Consecutive Months	8,494,000	754,000
12 Consecutive Months or Longer	8,581,000
Total	17,075,000	754,000
Agency collateralized mortgage obligations ("CMOs")
Securities available-for-sale, Fair Value [Abstract]
Less than 12 Consecutive Months	55,924,000	349,879,000
12 Consecutive Months or Longer	220,413,000	3,182,000
Total	276,337,000	353,061,000
Securities available-for-sale, Unrealized Losses [Abstract]
Less than 12 Consecutive Months	3,454,000	8,672,000
12 Consecutive Months or Longer	46,603,000	123,000
Total	$ 50,057,000	$ 8,795,000