LEASES - Schedule of Lease Costs and Other Lease Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) lease	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)
Finance lease costs:
Amortization expense	$ 190	$ 0	$ 190	$ 0
Interest expense	187	0	187	0
Variable lease costs	15	15	45	43
Short-term lease costs	14	12	44	70
Total lease cost	1,897	635	4,709	1,815
Cash flows related to leases
Operating cash flows from operating leases	2,657	1,034	7,212	2,915
Operating cash flows from finance leases	187	0	187	0
Financing cash flows from finance leases	99	0	99	0
Right of use assets obtained in exchange for operating lease liabilities	(6,331)	469	23,287	1,478
Right of use assets obtained in exchange for finance lease liabilities	$ 6,365	0	6,365	0
Number of operating leases reclassified to finance leases during period | lease	1
Net occupancy expense of premises
Operating lease costs:
Premises and Equipment rent expense	$ 1,483	604	4,221	1,692
Furniture and equipment expenses
Operating lease costs:
Premises and Equipment rent expense	$ 8	$ 4	22	10
CrossFirst
Cash flows related to leases
Right of use assets obtained in exchange for finance lease liabilities			6,400
Right of use assets obtained in exchange for operating lease liabilities			$ 23,200
M&M
Cash flows related to leases
Additional right of use assets obtained during the period in exchange for operating lease liabilities				700
Right of use assets obtained in exchange for operating lease liabilities				$ 100