XML 42 R33.htm IDEA: XBRL DOCUMENT
v3.22.1

Allowance for Losses on Loans - Internally Assigned Grade (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Sep. 30, 2021
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | $ 15,266,310 | $ 14,004,870
Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | $ 14,919,011 | $ 13,506,282
Pass | Accounts Receivable | Credit Concentration Risk |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total grade as a % of total loans | 97.72% | 96.44%
Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | $ 119,956 | $ 111,554
Special mention | Accounts Receivable | Credit Concentration Risk |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total grade as a % of total loans | 0.79% | 0.80%
Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | $ 227,343 | $ 387,034
Substandard | Accounts Receivable | Credit Concentration Risk |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total grade as a % of total loans | 1.49% | 2.76%
Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | $ 0 | $ 0
Doubtful | Accounts Receivable | Credit Concentration Risk |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total grade as a % of total loans | 0.00% | 0.00%
Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | $ 0 | $ 0
Loss | Accounts Receivable | Credit Concentration Risk |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total grade as a % of total loans | 0.00% | 0.00%
Commercial loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | $ 9,106,457 | $ 8,316,591
Commercial loans | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 8,782,294 | 7,840,800
Commercial loans | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 119,956 | 111,554
Commercial loans | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 204,207 | 364,237
Commercial loans | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Multi-family |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 2,377,657 | 2,273,689
Commercial loans | Multi-family | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 2,373,674 | 2,252,395
Commercial loans | Multi-family | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 1,745 | 4,874
Commercial loans | Multi-family | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 2,238 | 16,420
Commercial loans | Multi-family | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Multi-family | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Commercial real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 2,808,628 | 2,429,332
Commercial loans | Commercial real estate | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 2,643,011 | 2,174,386
Commercial loans | Commercial real estate | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 68,888 | 57,625
Commercial loans | Commercial real estate | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 96,729 | 197,321
Commercial loans | Commercial real estate | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Commercial real estate | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Commercial & industrial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 2,497,008 | 2,303,927
Commercial loans | Commercial & industrial | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 2,347,313 | 2,108,152
Commercial loans | Commercial & industrial | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 47,138 | 48,124
Commercial loans | Commercial & industrial | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 102,557 | 147,651
Commercial loans | Commercial & industrial | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Commercial & industrial | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Construction |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 1,212,103 | 1,117,227
Commercial loans | Construction | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 1,209,575 | 1,115,791
Commercial loans | Construction | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 2,185 | 931
Commercial loans | Construction | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 343 | 505
Commercial loans | Construction | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Construction | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Land - acquisition & development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 211,061 | 192,416
Commercial loans | Land - acquisition & development | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 208,721 | 190,076
Commercial loans | Land - acquisition & development | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Land - acquisition & development | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 2,340 | 2,340
Commercial loans | Land - acquisition & development | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Land - acquisition & development | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 6,159,853 | 5,688,279
Consumer loans | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 6,136,717 | 5,665,482
Consumer loans | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 23,136 | 22,797
Consumer loans | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Construction |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 344,113 | 347,752
Consumer loans | Construction | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 343,648 | 347,752
Consumer loans | Construction | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Construction | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 465 | 0
Consumer loans | Construction | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Construction | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Single-family residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 5,418,645 | 4,937,064
Consumer loans | Single-family residential | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 5,396,628 | 4,915,106
Consumer loans | Single-family residential | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Single-family residential | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 22,017 | 21,958
Consumer loans | Single-family residential | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Single-family residential | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Land - consumer lot loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 153,549 | 148,534
Consumer loans | Land - consumer lot loans | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 153,240 | 148,010
Consumer loans | Land - consumer lot loans | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Land - consumer lot loans | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 309 | 524
Consumer loans | Land - consumer lot loans | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Land - consumer lot loans | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | HELOC |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 175,929 | 166,940
Consumer loans | HELOC | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 175,600 | 166,652
Consumer loans | HELOC | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | HELOC | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 329 | 288
Consumer loans | HELOC | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | HELOC | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 67,617 | 87,989
Consumer loans | Consumer | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 67,601 | 87,962
Consumer loans | Consumer | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Consumer | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 16 | 27
Consumer loans | Consumer | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Consumer | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | $ 0 | $ 0

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13531-108611 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13537-108611 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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 No definition available. + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, before allowance for credit loss, of financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922355-210448 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (1) Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (2) Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1404 -Paragraph (a) + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_AccountsReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CreditConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_DoubtfulMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=wfsl_LossMember
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=srt_MultifamilyMember
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_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=wfsl_LandAcquisitionAndDevelopmentMember
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: |

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

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

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