ACQUISITIONS (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Jul. 01, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Assets
Goodwill	$ 1,090,610		$ 985,072	$ 985,072	$ 985,072
Enterprise Bancorp, Inc. [Member]
Assets
Cash		$ 123,638
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Investments		590,267
Loans		3,913,112
Business Combination, Acquired Receivable, Purchased without Credit Deterioration, Contractual Cash Flow, Estimated Uncollectible		(9,020)
Premises and equipment		35,706
Goodwill		105,538
Core deposit intangible		136,403
Other assets		158,772
Total assets acquired		5,054,416
Liabilities
Deposits		4,362,710
Borrowings		62,472
Business Combination Recognized Liability Assumed Subordinated Debts		59,974
Other liabilities		66,116
Total liabilities assumed		4,551,272
Purchase price		$ 503,144