2.2.0.25 true Sheet 00090 - Document - Document and Entity Information Document and Entity Information http://www.hatfin.com/role/DocumentDocumentAndEntityInformation false R1.xml false Sheet 00100 - Statement - Balance Sheets Balance Sheets http://www.hatfin.com/role/StatementBalanceSheets false R2.xml false Sheet 00105 - Statement - Balance Sheets (Parenthetical) Balance Sheets (Parenthetical) http://www.hatfin.com/role/StatementBalanceSheetsParenthetical false R3.xml false Sheet 00200 - Statement - Statements of Income Statements of Income http://www.hatfin.com/role/StatementStatementsOfIncome false R4.xml false Sheet 00300 - Statement - Statements of Changes in Shareholders' Equity Statements of Changes in Shareholders' Equity http://www.hatfin.com/role/StatementStatementsOfChangesInShareholdersEquity false R5.xml false Sheet 00400 - Statement - Statements of Cash Flows Statements of Cash Flows http://www.hatfin.com/role/StatementStatementsOfCashFlows false R6.xml false Sheet 00405 - Statement - Statements of Cash Flows (Parenthetical) Statements of Cash Flows (Parenthetical) http://www.hatfin.com/role/StatementStatementsOfCashFlowsParenthetical false R7.xml false Sheet 10101 - Disclosure - Organization and Business Description Organization and Business Description http://www.hatfin.com/role/DisclosureOrganizationAndBusinessDescription false R8.xml false Sheet 10201 - Disclosure - Summary of Significant Accounting Policies Summary of Significant Accounting Policies http://www.hatfin.com/role/DisclosureSummaryOfSignificantAccountingPolicies false R9.xml false Sheet 10301 - Disclosure - Financial Instruments Financial Instruments http://www.hatfin.com/role/DisclosureFinancialInstruments false R10.xml false Sheet 10401 - Disclosure - Mortgage-Backed Securities Mortgage-Backed Securities http://www.hatfin.com/role/DisclosureMortgageBackedSecurities false R11.xml false Sheet 10501 - Disclosure - Debt Security, Held to Maturity Debt Security, Held to Maturity http://www.hatfin.com/role/DisclosureDebtSecurityHeldToMaturity false R12.xml false Sheet 10601 - Disclosure - Repurchase Agreements Repurchase Agreements http://www.hatfin.com/role/DisclosureRepurchaseAgreements false R13.xml false Sheet 10701 - Disclosure - Derivatives - Interest Rate Swap Agreements Derivatives - Interest Rate Swap Agreements http://www.hatfin.com/role/DisclosureDerivativesInterestRateSwapAgreements false R14.xml false Sheet 10801 - Disclosure - Capital Stock Capital Stock http://www.hatfin.com/role/DisclosureCapitalStock false R15.xml false Sheet 10901 - Disclosure - Earnings per Share Earnings per Share http://www.hatfin.com/role/DisclosureEarningsPerShare false R16.xml false Sheet 11001 - Disclosure - Market and Dividend Information Market and Dividend Information http://www.hatfin.com/role/DisclosureMarketAndDividendInformation false R17.xml false Sheet 11101 - Disclosure - Equity Incentive Plan Equity Incentive Plan http://www.hatfin.com/role/DisclosureEquityIncentivePlan false R18.xml false Sheet 11201 - Disclosure - Transactions with Related Parties Transactions with Related Parties http://www.hatfin.com/role/DisclosureTransactionsWithRelatedParties false R19.xml false Sheet 11301 - Disclosure - Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income http://www.hatfin.com/role/DisclosureAccumulatedOtherComprehensiveIncome false R20.xml false Sheet 11401 - Disclosure - Contingency Contingency http://www.hatfin.com/role/DisclosureContingency false R21.xml false Sheet 11501 - Disclosure - Subsequent Events Subsequent Events http://www.hatfin.com/role/DisclosureSubsequentEvents false R22.xml false Sheet 11601 - Disclosure - Summarized Quarterly Financial Results Summarized Quarterly Financial Results http://www.hatfin.com/role/DisclosureSummarizedQuarterlyFinancialResults false R23.xml false Book All Reports All Reports false 1 37 4 0 3 112 false false As_Of_12_31_20092 1 As_Of_12_31_20094 1 As_Of_12_31_20105 1 Duration_1_1_2010_To_12_31_20104 3 As_Of_12_31_20095 1 Duration_1_1_2008_To_12_31_20082 6 Duration_1_1_2008_To_12_31_20085 5 As_Of_12_31_2008 2 Duration_1_1_2008_To_12_31_20084 5 Duration_1_1_2009_To_12_31_20092 4 As_Of_12_31_2010 32 Duration_1_1_2009_To_12_31_20093 4 As_Of_12_31_20074 1 Duration_1_1_2010_To_12_31_20105 4 As_Of_12_31_20104 1 As_Of_6_30_2010 1 As_Of_12_31_2007 2 Duration_1_1_2009_To_12_31_20095 4 As_Of_12_31_20103 1 As_Of_12_31_2009 32 As_Of_12_31_20085 1 Duration_1_1_2008_To_12_31_2008 45 As_Of_12_31_20102 1 Duration_1_1_2010_To_12_31_2010 72 Duration_1_1_2009_To_12_31_20094 2 Duration_1_1_2010_To_12_31_20102 4 Duration_1_1_2008_To_12_31_20083 5 As_Of_12_31_20073 1 As_Of_12_31_20084 1 As_Of_12_31_20083 1 Duration_1_1_2010_To_12_31_20103 4 As_Of_12_31_20093 1 Duration_1_1_2009_To_12_31_2009 40 As_Of_2_18_2011 1 As_Of_12_31_20082 1 As_Of_12_31_20075 1 As_Of_12_31_20072 1 true true