Fair Value of Financial Instruments, Quantitative Information for Level 3 Fair Value Measurements (Details) - Level 3 [Member] $ in Thousands	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Impaired loans	$ 1,151	$ 972
Market Comparable [Member] \| Adjustment to Appraisal Value [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Impaired loans, measurement input	0.0061	0.0050

The fair value disclosure of impaired loan receivable as presented on the statement of financial position which may include mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts, or any other loans which are due the Company as of the balance sheet date.

No definition available.

Name:	finw_ImpairedLoansFairValueDisclosure
Namespace Prefix:	finw_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant