COMMITMENTS, CONTINGENT LIABILITIES AND RESTRICTIONS (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Commitments and contingencies
Contract amount of commitments and contingencies	$ 2,178,897		$ 2,178,897		$ 2,004,574
Investment in investment tax credits during the period	10,000	$ 8,500
Investment in tax credits at balance sheet date	$ 11,800		$ 11,800		$ 3,400
Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration]	Other Assets		Other Assets		Other Assets
Unfunded commitments	$ 10,000		$ 10,000		$ 1,500
Tax credit recognized	500	2,500	900	$ 2,500
Amortization of income tax credit investments	700	$ 2,700	1,600	$ 2,800
Commitments to extend credit
Commitments and contingencies
Contract amount of commitments and contingencies	2,019,553		2,019,553		1,912,429
Standby letters of credit
Commitments and contingencies
Contract amount of commitments and contingencies	$ 159,344		$ 159,344		$ 92,145

Amount, before amortization expense, of income tax credit and other tax benefit generated by investment under tax credit program elected to be accounted for using proportional amortization method. Includes, but is not limited to, investment under tax credit program not meeting condition for accounting under proportional amortization method.

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