2.3.0.15 Html 40 163 1 false 6 0 false 3 true false R1.htm 00090 - Document - Document And Entity Information Sheet http://www.bankfinancial.com/role/DocumentDocumentAndEntityInformation Document And Entity Information false false R2.htm 00100 - Statement - Consolidated Statements Of Financial Condition Sheet http://www.bankfinancial.com/role/StatementConsolidatedStatementsOfFinancialCondition Consolidated Statements Of Financial Condition false false R3.htm 00105 - Statement - Consolidated Statements Of Financial Condition (Parenthetical) Sheet http://www.bankfinancial.com/role/StatementConsolidatedStatementsOfFinancialConditionParenthetical Consolidated Statements Of Financial Condition (Parenthetical) false false R4.htm 00200 - Statement - Consolidated Statements Of Operations Sheet http://www.bankfinancial.com/role/StatementConsolidatedStatementsOfOperations Consolidated Statements Of Operations false false R5.htm 00300 - Statement - Consolidated Statements Of Changes In Stockholders' Equity And Comprehensive Income (Loss) Sheet http://www.bankfinancial.com/role/StatementConsolidatedStatementsOfChangesInStockholdersEquityAndComprehensiveIncomeLoss Consolidated Statements Of Changes In Stockholders' Equity And Comprehensive Income (Loss) false false R6.htm 00305 - Statement - Consolidated Statements Of Changes In Stockholders' Equity And Comprehensive Income (Loss) (Parenthetical) Sheet http://www.bankfinancial.com/role/StatementConsolidatedStatementsOfChangesInStockholdersEquityAndComprehensiveIncomeLossParenthetical Consolidated Statements Of Changes In Stockholders' Equity And Comprehensive Income (Loss) (Parenthetical) false false R7.htm 00400 - Statement - Consolidated Statements Of Cash Flow Sheet http://www.bankfinancial.com/role/StatementConsolidatedStatementsOfCashFlow Consolidated Statements Of Cash Flow false false R8.htm 10101 - Disclosure - Condensed Summary Of Significant Accounting Policies Sheet http://www.bankfinancial.com/role/DisclosureCondensedSummaryOfSignificantAccountingPolicies Condensed Summary Of Significant Accounting Policies false false R9.htm 10201 - Disclosure - Earnings (Loss) Per Share Sheet http://www.bankfinancial.com/role/DisclosureEarningsLossPerShare Earnings (Loss) Per Share false false R10.htm 10301 - Disclosure - Securities Sheet http://www.bankfinancial.com/role/DisclosureSecurities Securities false false R11.htm 10401 - Disclosure - Loans Receivable Sheet http://www.bankfinancial.com/role/DisclosureLoansReceivable Loans Receivable false false R12.htm 10501 - Disclosure - Deposits Sheet http://www.bankfinancial.com/role/DisclosureDeposits Deposits false false R13.htm 10601 - Disclosure - Fair Values Sheet http://www.bankfinancial.com/role/DisclosureFairValues Fair Values false false R14.htm 10701 - Disclosure - Other Comprehensive Income (Loss) Sheet http://www.bankfinancial.com/role/DisclosureOtherComprehensiveIncomeLoss Other Comprehensive Income (Loss) false false R15.htm 10801 - Disclosure - Acquisitions Sheet http://www.bankfinancial.com/role/DisclosureAcquisitions Acquisitions false false R16.htm 10901 - Disclosure - Recent Accounting Pronouncements Sheet http://www.bankfinancial.com/role/DisclosureRecentAccountingPronouncements Recent Accounting Pronouncements false false R17.htm 11001 - Disclosure - Newly Issued But Not Yet Effective Accounting Pronouncements Sheet http://www.bankfinancial.com/role/DisclosureNewlyIssuedButNotYetEffectiveAccountingPronouncements Newly Issued But Not Yet Effective Accounting Pronouncements false false All Reports Book All Reports Process Flow-Through: 00100 - Statement - Consolidated Statements Of Financial Condition Process Flow-Through: Removing column 'Sep. 30, 2010' Process Flow-Through: Removing column 'Dec. 31, 2009' Process Flow-Through: 00105 - Statement - Consolidated Statements Of Financial Condition (Parenthetical) Process Flow-Through: 00200 - Statement - Consolidated Statements Of Operations Process Flow-Through: 00305 - Statement - Consolidated Statements Of Changes In Stockholders' Equity And Comprehensive Income (Loss) (Parenthetical) Process Flow-Through: 00400 - Statement - Consolidated Statements Of Cash Flow bfin-20110930.xml bfin-20110930.xsd bfin-20110930_cal.xml bfin-20110930_def.xml bfin-20110930_lab.xml bfin-20110930_pre.xml true true