XML 38 R28.htm IDEA: XBRL DOCUMENT
v3.19.2

Loans Receivable - Troubled Debt Restructurings (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2019 USD ($) contract | Jun. 30, 2018 USD ($) contract | Jun. 30, 2019 USD ($) contract | Jun. 30, 2018 USD ($) contract
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Number of Contracts | contract | 3 | 6 | 7 | 29
Pre-Modification Outstanding Recorded Investment | $ 619 | $ 789 | $ 982 | $ 12,240
Post-Modification Outstanding Recorded Investment | $ 619 | $ 789 | $ 982 | $ 12,240
Single-family residential |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Number of Contracts | contract | 3 | 5 | 6 | 25
Pre-Modification Outstanding Recorded Investment | $ 619 | $ 714 | $ 942 | $ 4,909
Post-Modification Outstanding Recorded Investment | $ 619 | $ 714 | $ 942 | $ 4,909
Land - consumer lot loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Number of Contracts | contract |  |  | 1 | 0
Pre-Modification Outstanding Recorded Investment |  |  | $ 40 | $ 0
Post-Modification Outstanding Recorded Investment |  |  | $ 40 | $ 0
Commercial & industrial |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Number of Contracts | contract |  |  | 0 | 3
Pre-Modification Outstanding Recorded Investment |  |  | $ 0 | $ 7,256
Post-Modification Outstanding Recorded Investment |  |  | $ 0 | $ 7,256
HELOC |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Number of Contracts | contract | 0 | 1 | 0 | 1
Pre-Modification Outstanding Recorded Investment | $ 0 | $ 75 | $ 0 | $ 75
Post-Modification Outstanding Recorded Investment | $ 0 | $ 75 | $ 0 | $ 75

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_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Post-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Pre-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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

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

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