SECURITIES - Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 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	69,094	$ 422,634
12 Consecutive Months or Longer	183,561	4,748
Total	252,655	427,382
Securities available-for-sale, Unrealized Losses [Abstract]
Less than 12 Consecutive Months	4,440	6,333
12 Consecutive Months or Longer	30,062	233
Total	34,502	6,566
Treasury Securities
Securities available-for-sale, Fair Value [Abstract]
Less than 12 Consecutive Months		244,769
12 Consecutive Months or Longer	225,925
Total	225,925	244,769
Securities available-for-sale, Unrealized Losses [Abstract]
Less than 12 Consecutive Months		3,147
12 Consecutive Months or Longer	21,232
Total	21,232	3,147
State and municipal obligations
Securities available-for-sale, Fair Value [Abstract]
Less than 12 Consecutive Months	18,428	18,887
12 Consecutive Months or Longer	15,170
Total	33,598	18,887
Securities available-for-sale, Unrealized Losses [Abstract]
Less than 12 Consecutive Months	1,498	302
12 Consecutive Months or Longer	2,061
Total	3,559	302
Agency Notes
Securities available-for-sale, Fair Value [Abstract]
Less than 12 Consecutive Months		58,607
12 Consecutive Months or Longer		21,647
Total		80,254
Securities available-for-sale, Unrealized Losses [Abstract]
Less than 12 Consecutive Months		1,369
12 Consecutive Months or Longer		853
Total		2,222
Corporate Notes
Securities available-for-sale, Fair Value [Abstract]
Less than 12 Consecutive Months	135,613	37,620
12 Consecutive Months or Longer	21,419
Total	157,032	37,620
Securities available-for-sale, Unrealized Losses [Abstract]
Less than 12 Consecutive Months	13,125	754
12 Consecutive Months or Longer	4,187
Total	17,312	754
Agency collateralized mortgage obligations ("CMOs")
Securities available-for-sale, Fair Value [Abstract]
Less than 12 Consecutive Months	80,929	349,879
12 Consecutive Months or Longer	207,788	3,182
Total	288,717	353,061
Securities available-for-sale, Unrealized Losses [Abstract]
Less than 12 Consecutive Months	5,456	8,672
12 Consecutive Months or Longer	43,563	123
Total	$ 49,019	$ 8,795

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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