2.4.0.84063 - Disclosure - Loans and Servicing (Details 4)truefalseIn Thousands, unless otherwise specifiedfalse1false USDfalsefalse$D2013Q2YTDhttp://www.sec.gov/CIK0001542299duration2013-01-01T00:00:002013-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$D2012http://www.sec.gov/CIK0001542299duration2012-01-01T00:00:002012-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 4us-gaap_ImpairedFinancingReceivableRecordedInvestmentAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Recorded Investment2false 5us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse430000430USD$falsetruefalse2truefalsefalse3200032USD$falsetruefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired loans without a valuation allowance3false 5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse26990002699USD$falsefalsefalse2truefalsefalse30830003083USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired loans with a valuation allowance4true 4us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalanceAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Unpaid Principal Balance5false 5us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse430000430USD$falsefalsefalse2truefalsefalse3200032USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired loans without a valuation allowance6false 5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse28060002806USD$falsefalsefalse2truefalsefalse32160003216USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired loans with a valuation allowance7true 4gtwn_ImpairedFinancingReceivableRelatedAllowanceAbstractgtwn_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Related Allowance8false 5us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse240000240USD$falsefalsefalse2truefalsefalse320000320USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired loans with a valuation allowance9true 4us-gaap_ImpairedFinancingReceivableAverageRecordedInvestmentAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Recorded Investment10false 5us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestmentus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse373000373USD$falsefalsefalse2truefalsefalse13510001351USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of average investment of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5258-111524 false2Impaired loans without a valuation allowance11false 5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestmentus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse28650002865USD$falsefalsefalse2truefalsefalse17110001711USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of average investment of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5258-111524 false2Impaired loans with a valuation allowance12true 4us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethodAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Interest Income Recognized13false 5us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethodus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse10001USD$falsefalsefalse2truefalsefalse2300023USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of interest income, recognized on accrual basis, on financing receivables that are recognized as impaired, for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired loans without a valuation allowance14false 5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethodus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse6300063USD$falsefalsefalse2truefalsefalse3000030USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of interest income, recognized on accrual basis, on financing receivables, for which there is a related allowance for credit losses and are recognized as impaired.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired loans with a valuation allowance15false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3false USDtruefalse$D2013Q2YTD_OneToFourFamilyResidentialMortgageLoanMemberhttp://www.sec.gov/CIK0001542299duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseOne- to four- family, residential loansus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisxbrldihttp://xbrl.org/2006/xbrldigtwn_OneToFourFamilyResidentialMortgageLoanMemberus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0One- to four- family, residential loans16true 4us-gaap_ImpairedFinancingReceivableRecordedInvestmentAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Recorded Investment17false 5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse278000278USD$falsefalsefalse2truefalsefalse658000658USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired loans with a valuation allowance18true 4us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalanceAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Unpaid Principal Balance19false 5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse278000278USD$falsefalsefalse2truefalsefalse684000684USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired loans with a valuation allowance20true 4gtwn_ImpairedFinancingReceivableRelatedAllowanceAbstractgtwn_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Related Allowance21false 5us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1400014USD$falsefalsefalse2truefalsefalse9300093USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired loans with a valuation allowance22true 4us-gaap_ImpairedFinancingReceivableAverageRecordedInvestmentAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Recorded Investment23false 5us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestmentus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse176000176USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of average investment of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5258-111524 false2Impaired loans without a valuation allowance24false 5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestmentus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse441000441USD$falsefalsefalse2truefalsefalse734000734USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of average investment of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5258-111524 false2Impaired loans with a valuation allowance25true 4us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethodAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Interest Income Recognized26false 5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethodus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse70007USD$falsefalsefalse2truefalsefalse1000010USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of interest income, recognized on accrual basis, on financing receivables, for which there is a related allowance for credit losses and are recognized as impaired.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired loans with a valuation allowance27false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse5false USDtruefalse$D2013Q2YTD_HomeEquityMemberhttp://www.sec.gov/CIK0001542299duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseHome equity loans and lines of creditus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_HomeEquityMemberus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Home equity loans and lines of credit28true 4us-gaap_ImpairedFinancingReceivableRecordedInvestmentAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Recorded Investment29false 5us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse430000430USD$falsefalsefalse2truefalsefalse3200032USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired loans without a valuation allowance30false 5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1300013USD$falsefalsefalse2truefalsefalse1300013USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired loans with a valuation allowance31true 4us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalanceAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Unpaid Principal Balance32false 5us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse430000430USD$falsefalsefalse2truefalsefalse3200032USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired loans without a valuation allowance33false 5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1300013USD$falsefalsefalse2truefalsefalse1300013USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired loans with a valuation allowance34true 4gtwn_ImpairedFinancingReceivableRelatedAllowanceAbstractgtwn_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Related Allowance35false 5us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1300013USD$falsefalsefalse2truefalsefalse1300013USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired loans with a valuation allowance36true 4us-gaap_ImpairedFinancingReceivableAverageRecordedInvestmentAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Recorded Investment37false 5us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestmentus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse373000373USD$falsefalsefalse2truefalsefalse3000030USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of average investment of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5258-111524 false2Impaired loans without a valuation allowance38false 5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestmentus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1300013USD$falsefalsefalse2truefalsefalse1300013USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of average investment of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5258-111524 false2Impaired loans with a valuation allowance39true 4us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethodAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Interest Income Recognized40false 5us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethodus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse10001USD$falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of interest income, recognized on accrual basis, on financing receivables that are recognized as impaired, for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired loans without a valuation allowance41false 5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethodus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse10001USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of interest income, recognized on accrual basis, on financing receivables, for which there is a related allowance for credit losses and are recognized as impaired.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired loans with a valuation allowance42false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse7false USDtruefalse$D2013Q2YTD_CommercialRealEstateMemberhttp://www.sec.gov/CIK0001542299duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseCommercial real estateus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialRealEstateMemberus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Commercial real estate43true 4us-gaap_ImpairedFinancingReceivableRecordedInvestmentAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Recorded Investment44false 5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse24080002408USD$falsefalsefalse2truefalsefalse24120002412USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired loans with a valuation allowance45true 4us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalanceAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Unpaid Principal Balance46false 5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse25150002515USD$falsefalsefalse2truefalsefalse25190002519USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired loans with a valuation allowance47true 4gtwn_ImpairedFinancingReceivableRelatedAllowanceAbstractgtwn_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Related Allowance48false 5us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse213000213USD$falsefalsefalse2truefalsefalse214000214USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired loans with a valuation allowance49true 4us-gaap_ImpairedFinancingReceivableAverageRecordedInvestmentAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Recorded Investment50false 5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestmentus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse24110002411USD$falsefalsefalse2truefalsefalse958000958USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of average investment of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5258-111524 false2Impaired loans with a valuation allowance51true 4us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethodAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Interest Income Recognized52false 5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethodus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse5600056USD$falsefalsefalse2truefalsefalse1900019USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of interest income, recognized on accrual basis, on financing receivables, for which there is a related allowance for credit losses and are recognized as impaired.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired loans with a valuation allowance53false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse9false USDtruefalse$D2012_CommercialBusinessMemberhttp://www.sec.gov/CIK0001542299duration2012-01-01T00:00:002012-12-31T00:00:00falsefalseCommercial businessus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisxbrldihttp://xbrl.org/2006/xbrldigtwn_CommercialBusinessMemberus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Commercial business54true 4us-gaap_ImpairedFinancingReceivableAverageRecordedInvestmentAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Recorded Investment55false 5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestmentus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse60006USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of average investment of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5258-111524 false2Impaired loans with a valuation allowance56false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse10false USDtruefalse$D2012_OneToFourFamilyConstructionLoansMemberhttp://www.sec.gov/CIK0001542299duration2012-01-01T00:00:002012-12-31T00:00:00falsefalseOne-to-four family, construction loansus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisxbrldihttp://xbrl.org/2006/xbrldigtwn_OneToFourFamilyConstructionLoansMemberus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0One-to-four family, construction loans57true 4us-gaap_ImpairedFinancingReceivableAverageRecordedInvestmentAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Recorded Investment58false 5us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestmentus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse801000801USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of average investment of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5258-111524 false2Impaired loans without a valuation allowance59false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse11false USDtruefalse$D2012_MultiFamilyConstructionLoansMemberhttp://www.sec.gov/CIK0001542299duration2012-01-01T00:00:002012-12-31T00:00:00falsefalseMulti-familyus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisxbrldihttp://xbrl.org/2006/xbrldigtwn_MultiFamilyConstructionLoansMemberus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Multi-family60true 4us-gaap_ImpairedFinancingReceivableAverageRecordedInvestmentAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Recorded Investment61false 5us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestmentus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse344000344USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of average investment of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5258-111524 false2Impaired loans without a valuation allowance62true 4us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethodAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Interest Income Recognized63false 5us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethodus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse2300023USD$falsetruefalsexbrli:monetaryItemTypemonetaryAmount of interest income, recognized on accrual basis, on financing receivables that are recognized as impaired, for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired loans without a valuation allowancefalseLoans and Servicing (Details 4) (USD $)ThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.georgetownsb.com/role/DisclosureLoansAndServicingDetails4263