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BORROWED FUNDS - Schedule of Maturities of FHLBB Advances (Details) - Fixed Rate Advances $ in Thousands	Jun. 30, 2023 USD ($)
Principal
2023	$ 460,000
2024	40,017
2025	40,000
2026	65,539
2027 and beyond	68,789
Total FHLBB advances	$ 674,345
Weighted Average
Weighted Average Rate
2023	0.0545
2024	5.05%
2025	4.55%
2026	3.61%
2027 and beyond	0.0316
Total FHLB advances	4.96%

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