COMMITMENTS AND CONTINGENCIES - Schedule of Unfunded Loan Commitments (Details) - Unfunded Loan Commitment - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Unfunded Loan Commitments [Roll Forward]
Beginning balance	$ 672	$ 2,178
Provision for (release of) credit losses	29	(1,506)
Ending balance	$ 701	$ 672

Financing Receivable, Allowance for Credit Losses, (Release) Provision For Credit Losses

No definition available.

Name:	myfw_FinancingReceivableAllowanceForCreditLossesReleaseProvisionForCreditLosses
Namespace Prefix:	myfw_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration