No definition available.

Name:	finw_FederalHomeLoanBankSecuredLineOfCreditAbstract
Namespace Prefix:	finw_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The ability to access Federal Reserve Bank's Discount Window on a collateralized basis.

+ References

No definition available.

+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
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-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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Balance Type:	na
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Average amount borrowed under the credit facility during the period.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityAverageOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=finw_PaycheckProtectionProgramLiquidityFacilityMember
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- Details

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Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=finw_BankOfTheWestMember
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Commitments and Contingent Liabilities, Federal Home Loan Bank Secured Line of Credit (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Apr. 20, 2020
Paycheck Protection Program Liquidity Facility [Member]
Federal Home Loan Bank Secured Line of Credit [Abstract]
Line of credit to borrow in overnight funds	$ 1,000		$ 1,000
Borrowings Fixed-rate of interest				0.35%
Average outstanding borrowings	1,000	$ 87,300
Line of Credit [Member]
Federal Home Loan Bank Secured Line of Credit [Abstract]
Outstanding line of credit	0		0
Federal Reserve Bank borrowings on collateral	9,600		10,900
Zion Bank [Member] \| Line of Credit [Member]
Federal Home Loan Bank Secured Line of Credit [Abstract]
Unsecured line	1,000		1,000
Bank of the West [Member] \| Line of Credit [Member]
Federal Home Loan Bank Secured Line of Credit [Abstract]
Line of credit to borrow in overnight funds	1,050		1,050
Federal Home Loan Bank Secured Line of Credit [Member]
Federal Home Loan Bank Secured Line of Credit [Abstract]
Line of credit to borrow in overnight funds	3,900		4,100
Outstanding line of credit	0		0
Loans pledged to secure line of credit	$ 5,200		$ 5,400