XML 96 R58.htm IDEA: XBRL DOCUMENT
v3.21.2

Allowance for Loan Losses - Internally Assigned Grade (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | $ 14,004,870 | $ 12,959,272
Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | $ 13,506,282 | $ 12,303,135
Pass | Accounts Receivable | Credit Concentration Risk |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total grade as a % of total loans | 96.40% | 94.90%
Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | $ 111,554 | $ 247,543
Special Mention | Accounts Receivable | Credit Concentration Risk |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total grade as a % of total loans | 0.80% | 1.90%
Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | $ 387,034 | $ 408,594
Substandard | Accounts Receivable | Credit Concentration Risk |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total grade as a % of total loans | 2.80% | 3.20%
Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | $ 0 | $ 0
Doubtful [Member] | Accounts Receivable | Credit Concentration Risk |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total grade as a % of total loans | 0.00% | 0.00%
Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | $ 0 | $ 0
Loss [Member] | 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] |  |
Total loans | $ 8,316,591 | $ 7,044,426
Commercial loans | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 7,840,800 | 6,412,415
Commercial loans | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 111,554 | 247,351
Commercial loans | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 364,237 | 384,660
Commercial loans | Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Commercial loans | Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Commercial loans | Multi-family |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 2,273,689 | 1,538,240
Commercial loans | Multi-family | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 2,252,395 | 1,506,692
Commercial loans | Multi-family | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 4,874 | 13,721
Commercial loans | Multi-family | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 16,420 | 17,827
Commercial loans | Multi-family | Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Commercial loans | Multi-family | Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Commercial loans | Commercial real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 2,429,332 | 1,884,688
Commercial loans | Commercial real estate | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 2,174,386 | 1,681,230
Commercial loans | Commercial real estate | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 57,625 | 92,184
Commercial loans | Commercial real estate | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 197,321 | 111,274
Commercial loans | Commercial real estate | Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Commercial loans | Commercial real estate | Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Commercial loans | Commercial & industrial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 2,303,927 | 2,115,513
Commercial loans | Commercial & industrial | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 2,108,152 | 1,898,709
Commercial loans | Commercial & industrial | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 48,124 | 64,695
Commercial loans | Commercial & industrial | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 147,651 | 152,109
Commercial loans | Commercial & industrial | Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Commercial loans | Commercial & industrial | Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Commercial loans | Construction |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 1,117,227 | 1,352,414
Commercial loans | Construction | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 1,115,791 | 1,187,786
Commercial loans | Construction | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 931 | 61,178
Commercial loans | Construction | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 505 | 103,450
Commercial loans | Construction | Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Commercial loans | Construction | Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Commercial loans | Land - acquisition & development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 192,416 | 153,571
Commercial loans | Land - acquisition & development | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 190,076 | 137,998
Commercial loans | Land - acquisition & development | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 15,573
Commercial loans | Land - acquisition & development | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 2,340 | 0
Commercial loans | Land - acquisition & development | Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Commercial loans | Land - acquisition & development | Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Consumer loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 5,688,279 | 5,914,846
Consumer loans | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 5,665,482 | 5,890,720
Consumer loans | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 192
Consumer loans | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 22,797 | 23,934
Consumer loans | Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Consumer loans | Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Consumer loans | Construction |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 347,752 | 295,953
Consumer loans | Construction | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 347,752 | 295,953
Consumer loans | Construction | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Consumer loans | Construction | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Consumer loans | Construction | Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Consumer loans | Construction | Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Consumer loans | Single-family residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 4,937,064 | 5,293,962
Consumer loans | Single-family residential | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 4,915,106 | 5,270,666
Consumer loans | Single-family residential | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 192
Consumer loans | Single-family residential | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 21,958 | 23,104
Consumer loans | Single-family residential | Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Consumer loans | Single-family residential | Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Consumer loans | Land - consumer lot loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 148,534 | 101,394
Consumer loans | Land - consumer lot loans | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 148,010 | 101,151
Consumer loans | Land - consumer lot loans | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Consumer loans | Land - consumer lot loans | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 524 | 243
Consumer loans | Land - consumer lot loans | Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Consumer loans | Land - consumer lot loans | Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Consumer loans | HELOC |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 166,940 | 140,222
Consumer loans | HELOC | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 166,652 | 139,646
Consumer loans | HELOC | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Consumer loans | HELOC | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 288 | 576
Consumer loans | HELOC | Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Consumer loans | HELOC | Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Consumer loans | Consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 87,989 | 83,315
Consumer loans | Consumer | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 87,962 | 83,304
Consumer loans | Consumer | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Consumer loans | Consumer | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 27 | 11
Consumer loans | Consumer | Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Consumer loans | Consumer | Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total 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 Amount excluding accrued interest, 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 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447 Reference 2: 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 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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
- 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: |