LEASES - Schedule of Lease Costs and Other Lease Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Finance lease costs:
Amortization expense	$ 269	$ 0	$ 0
Interest expense	267	0	0
Variable lease costs	60	58	38
Short-term lease costs	58	83	50
Total lease cost	6,574	2,493	2,483
Cash flows related to leases
Operating cash flows from operating leases	10,185	3,992	4,173
Operating cash flows from finance leases	267	0	0
Financing cash flows from finance leases	141	0	0
Right of use assets obtained in exchange for operating lease liabilities	25,590	1,579	231
Right of use assets obtained in exchange for finance lease liabilities	6,365	0	0
Right of use assets obtained in exchange for operating lease liabilities	25,590	1,579	231
Net occupancy expense of premises
Operating lease costs:
Premises and Equipment rent expense	5,891	2,335	2,379
Furniture and equipment expenses
Operating lease costs:
Premises and Equipment rent expense	29	17	$ 16
CrossFirst
Cash flows related to leases
Right of use assets obtained in exchange for operating lease liabilities	23,200
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
Right of use assets obtained in exchange for operating lease liabilities		100
Right of use assets obtained in exchange for operating lease liabilities		100
Additional right of use assets obtained during the period in exchange for operating lease liabilities		$ 700