XML 20 R30.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Loans Receivable (excluding Covered Loans) (Loan Modifications) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Dec. 31, 2012 Contracts | Dec. 31, 2011 Contracts
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts (in contracts) | 36 | 39
Recorded Investment | $ 8,402 | $ 9,066
Residential Portfolio Segment [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts (in contracts) | 31 | 36
Recorded Investment | 7,498 | 8,413
Construction, Speculative [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts (in contracts) | 5 | 0
Recorded Investment | 904 | 0
Construction, Custom [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts (in contracts) | 0 | 0
Recorded Investment | 0 | 0
Land, Acquisition and Development [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts (in contracts) | 0 | 0
Recorded Investment | 0 | 0
Land, Consumer Lot Loans [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts (in contracts) | 0 | 3
Recorded Investment | 0 | 653
Multi Family Housing [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts (in contracts) | 0 | 0
Recorded Investment | 0 | 0
Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts (in contracts) | 0 | 0
Recorded Investment | 0 | 0
Commercial and Industrial Loans [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts (in contracts) | 0 | 0
Recorded Investment | 0 | 0
Home Equity Line of Credit [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts (in contracts) | 0 | 0
Recorded Investment | 0 | 0
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts (in contracts) | 0 | 0
Recorded Investment | $ 0 | $ 0

X
- Details
Name: | us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Financing Receivable, Modifications, Number of Contracts that Subsequently Defaulted + References No definition available. + Details
Name: | wfsl_FinancingReceivableModificationsNumberOfContractsThatSubsequentlyDefaulted
Namespace Prefix: | wfsl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Financing Receivable, Modifications, Recorded Investment During the Period + References No definition available. + Details
Name: | wfsl_FinancingReceivableModificationsRecordedInvestmentDuringPeriod
Namespace Prefix: | wfsl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration