SUPPLEMENTAL FINANCIAL DATA (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
SUPPLEMENTAL FINANCIAL DATA
Corporate development and related	$ 378	$ 285
Loan and deposit related	127	204
Other	88	90
Total other non-interest expense	$ 593	$ 579

The amount of other non-interest expense based on aggregate total interest income and other income.

No definition available.

Name:	myfw_OtherNonInterestExpenseBasedOnAggregateTotalInterestAndOtherIncome
Namespace Prefix:	myfw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration