XML 113 R70.htm IDEA: XBRL DOCUMENT
v3.24.3

Loans Receivable - Schedule of Loan Modifications (Details) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2024 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Term Extension | $ 104,492
Term Extension |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Term Extension | $ 104,492
% of Total Loan Class Balance | 0.49%
Wtd. Avg. Term Extension | 13 months
Commercial loans |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Term Extension | $ 103,610
Commercial loans | Term Extension |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Term Extension | $ 103,610
% of Total Loan Class Balance | 0.85%
Commercial loans | Commercial real estate |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Term Extension | $ 23,449
Commercial loans | Commercial real estate | Term Extension |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Term Extension | $ 23,449
% of Total Loan Class Balance | 0.63%
Wtd. Avg. Term Extension | 36 months
Commercial loans | Commercial & industrial |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Term Extension | $ 61,074
Commercial loans | Commercial & industrial | Term Extension |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Term Extension | $ 61,074
% of Total Loan Class Balance | 2.62%
Wtd. Avg. Term Extension | 4 months
Commercial loans | Construction |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Term Extension | $ 19,087
Commercial loans | Construction | Term Extension |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Term Extension | $ 19,087
% of Total Loan Class Balance | 1.34%
Wtd. Avg. Term Extension | 12 months
Consumer loans |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Term Extension | $ 882
Consumer loans | Term Extension |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Term Extension | $ 882
% of Total Loan Class Balance | 0.01%
Consumer loans | Single-family residential |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Term Extension | $ 882
Consumer loans | Single-family residential | Term Extension |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Term Extension | $ 882
% of Total Loan Class Balance | 0.01%
Wtd. Avg. Term Extension | 6 months

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 20 -Name Accounting Standards Codification -Section 40 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481628/310-20-40-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481990/310-10-45-2 + Details
Name: | us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestModifiedPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage, excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty to total financing receivables. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
Name: | us-gaap_FinancingReceivableModificationToTotalFinancingReceivablesExcludingAccruedInterestPercent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period of increase in weighted average maturity of financing receivable modified for debtor experiencing financial difficulty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A + Details
Name: | us-gaap_FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=us-gaap_ExtendedMaturityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=wfsl_CommercialAndIndustrialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=srt_SingleFamilyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |