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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $) In Thousands, unless otherwise specified | 6 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES |  |
Net income | $ 78,768 us-gaap_NetIncomeLoss | $ 78,893 us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 10,566 wfsl_AmortizationAccretionOfFeesDiscountsPremiumsAndIntangibleAssetsNet | 5,993 wfsl_AmortizationAccretionOfFeesDiscountsPremiumsAndIntangibleAssetsNet
Cash received from (paid to) FDIC under loss share | (738)wfsl_IncreaseDecreaseInFdicIndemnificationAsset | 1,629 wfsl_IncreaseDecreaseInFdicIndemnificationAsset
Stock option compensation expense | 600 us-gaap_StockOptionPlanExpense | 600 us-gaap_StockOptionPlanExpense
Reversal of provision for loan losses | (9,449)us-gaap_ProvisionForLoanAndLeaseLosses | (8,936)us-gaap_ProvisionForLoanAndLeaseLosses
Gain on real estate held for sale | (12,338)wfsl_GainLossonRealEstateHeldforsale | (1,042)wfsl_GainLossonRealEstateHeldforsale
Decrease (increase) in accrued interest receivable | 11,678 us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet | (2,066)us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet
Increase in FDIC loss share receivable | 1,795 wfsl_IncreaseDecreaseInFdicLossShareReceivable | (1,896)wfsl_IncreaseDecreaseInFdicLossShareReceivable
Decrease in federal and state income tax | 6,995 us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable | 5,043 us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable
Increase in cash surrender value in bank owned life insurance | (961)us-gaap_BankOwnedLifeInsuranceIncome | 0 us-gaap_BankOwnedLifeInsuranceIncome
Decrease (increase) in other assets | (28,462)us-gaap_IncreaseDecreaseInOtherOperatingAssets | 6,113 us-gaap_IncreaseDecreaseInOtherOperatingAssets
Increase (decrease) in accrued expenses and other liabilities | 586 us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities | (7,753)us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities
Net cash provided by operating activities | 59,040 us-gaap_NetCashProvidedByUsedInOperatingActivities | 76,578 us-gaap_NetCashProvidedByUsedInOperatingActivities
CASH FLOWS FROM INVESTING ACTIVITIES |  |
Net loan originations | (78,301)wfsl_LoansOriginatedNetOfPrincipalCollections | (127,918)wfsl_LoansOriginatedNetOfPrincipalCollections
Loans purchased | (146,832)us-gaap_PaymentsToAcquireLoansHeldForInvestment | 0 us-gaap_PaymentsToAcquireLoansHeldForInvestment
FHLB & FRB stock redemption | 7,921 us-gaap_PaymentsForProceedsFromFederalHomeLoanBankStock | 5,682 us-gaap_PaymentsForProceedsFromFederalHomeLoanBankStock
Available-for-sale securities purchased | (163,126)us-gaap_PaymentsToAcquireAvailableForSaleSecurities | (930,476)us-gaap_PaymentsToAcquireAvailableForSaleSecurities
Principal payments and maturities of available-for-sale securities | 466,991 us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities | 185,050 us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities
Principal payments and maturities of held-to-maturity securities | 65,913 us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities | 42,253 us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities
Net cash received from acquisitions | 0 us-gaap_CashAcquiredFromAcquisition | 1,254,517 us-gaap_CashAcquiredFromAcquisition
Proceeds from sales of real estate owned and held for investment | 28,354 us-gaap_ProceedsFromSaleOfPropertyHeldForSale | 28,489 us-gaap_ProceedsFromSaleOfPropertyHeldForSale
Proceeds from sales of covered REO | 9,050 wfsl_ProceedsFromSalesOfCoveredRealEstateOwned | 17,216 wfsl_ProceedsFromSalesOfCoveredRealEstateOwned
Purchase of bank owned life insurance | (100,000)us-gaap_PaymentsToAcquireLifeInsurancePolicies | 0 us-gaap_PaymentsToAcquireLifeInsurancePolicies
Premises and equipment purchased and REO improvements | (16,897)wfsl_PremisesAndEquipmentPurchasedAndReoImprovements | (19,659)wfsl_PremisesAndEquipmentPurchasedAndReoImprovements
Net cash provided by investing activities | 73,073 us-gaap_NetCashProvidedByUsedInInvestingActivities | 455,154 us-gaap_NetCashProvidedByUsedInInvestingActivities
CASH FLOWS FROM FINANCING ACTIVITIES |  |
Net decrease in customer accounts | (24,227)us-gaap_IncreaseDecreaseInDeposits | (59,630)us-gaap_IncreaseDecreaseInDeposits
Repayments of borrowings | (100,000)us-gaap_RepaymentsOfDebt | 0 us-gaap_RepaymentsOfDebt
Proceeds from exercise of common stock options and related tax benefit | 492 us-gaap_ProceedsFromStockOptionsExercised | 9,911 us-gaap_ProceedsFromStockOptionsExercised
Dividends paid on common stock | (26,806)us-gaap_PaymentsOfDividendsCommonStock | (20,372)us-gaap_PaymentsOfDividendsCommonStock
Treasury stock purchased | (77,355)us-gaap_PaymentsForRepurchaseOfCommonStock | (31,776)us-gaap_PaymentsForRepurchaseOfCommonStock
Decrease in advance payments by borrowers for taxes and insurance | (10,996)us-gaap_IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance | (25,192)us-gaap_IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance
Net cash used in financing activities | (238,892)us-gaap_NetCashProvidedByUsedInFinancingActivities | (127,059)us-gaap_NetCashProvidedByUsedInFinancingActivities
Increase (decrease) in cash and cash equivalents | (106,779)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 404,673 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents at beginning of period | 781,843 us-gaap_CashAndCashEquivalentsAtCarryingValue | 203,563 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents at end of period | 675,064 us-gaap_CashAndCashEquivalentsAtCarryingValue | 608,236 us-gaap_CashAndCashEquivalentsAtCarryingValue
Non-cash investing activities |  |
Non-covered real estate acquired through foreclosure | 18,991 wfsl_NonCoveredRealEstateAcquiredThroughForeclosure | 20,898 wfsl_NonCoveredRealEstateAcquiredThroughForeclosure
Covered real estate acquired through foreclosure | 936 wfsl_CoveredRealEstateAcquiredThroughForeclosure | 836 wfsl_CoveredRealEstateAcquiredThroughForeclosure
Cash paid during the period for |  |
Interest | 62,193 us-gaap_InterestPaid | 65,499 us-gaap_InterestPaid
Income taxes | 32,517 us-gaap_IncomeTaxesPaid | 37,572 us-gaap_IncomeTaxesPaid
The following summarizes the non-cash activities related to acquisitions |  |
Fair value of assets and intangibles acquired, including goodwill | 0 us-gaap_FairValueOfAssetsAcquired | 63,111 us-gaap_FairValueOfAssetsAcquired
Fair value of liabilities assumed | 0 us-gaap_LiabilitiesAssumed1 | (1,317,628)us-gaap_LiabilitiesAssumed1
Net fair value of assets (liabilities) | $ 0 wfsl_NetFairValueOfAssetsLiabilities | $ (1,254,517)wfsl_NetFairValueOfAssetsLiabilities

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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The cash outflow to acquire debt and equity securities not classified as either held-to-maturity securities or trading securities which would be classified as available-for-sale securities and reported at fair value, with unrealized gains and losses excluded from earnings and reported in a separate component of shareholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash outflow for payments to purchase life insurance policies for which the entity is the beneficiary. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash outflow associated with purchasing loans held for investment purposes during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash inflow associated with maturities (principal being due), prepayments and calls (requests of early payments) on securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash inflow associated with the maturity, prepayments and calls (requests for early payments) of debt securities designated as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash inflow from the sale of formerly productive land held for sale, anything permanently fixed to it, including buildings, structures on it, and so forth. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition Amount of expense related to estimated loss from loan and lease transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. + References No definition available. + Details
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- Definition The noncash expense that accounts for the value of stock or unit options distributed to employees as compensation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition The aggregate amount of recurring non-cash expense charged against earnings in the period for net deferred loan fees, discounts/premiums of investments and to allocate the cost of intangible assets over their estimated remaining economic lives. + References No definition available. + Details
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- Definition The amount of covered real estate investments acquired through foreclosure during the period. Title through foreclosure occurs in a legal proceeding in which a secured creditor obtains title typically be bidding the amount of debt owed to it after the borrower has defaulted on the debt instrument. + References No definition available. + Details
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- Definition The amount of non-covered real estate investments acquired through foreclosure during the period. Title through foreclosure occurs in a legal proceeding in which a secured creditor obtains title typically be bidding the amount of debt owed to it after the borrower has defaulted on the debt instrument. + References No definition available. + Details
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