XML 99 R69.htm IDEA: XBRL DOCUMENT v2.4.1.9
Commitments and Contingencies (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Loan commitments    
Commitments to grant loans 4,254gtwn_CommitmentsToGrantLoans $ 4,083gtwn_CommitmentsToGrantLoans
Home equity loans and lines of credit    
Loan commitments    
Unadvanced funds on loan 8,809gtwn_CommitmentsToUnadvancedPortionOfLoans
/ gtwn_LoanCommitmentsByNatureOfCommitmentsAxis
= us-gaap_HomeEquityMember		 9,438gtwn_CommitmentsToUnadvancedPortionOfLoans
/ gtwn_LoanCommitmentsByNatureOfCommitmentsAxis
= us-gaap_HomeEquityMember
Commercial lines of credit    
Loan commitments    
Unadvanced funds on loan 12,324gtwn_CommitmentsToUnadvancedPortionOfLoans
/ gtwn_LoanCommitmentsByNatureOfCommitmentsAxis
= gtwn_CommercialLinesOfCreditMember		 9,001gtwn_CommitmentsToUnadvancedPortionOfLoans
/ gtwn_LoanCommitmentsByNatureOfCommitmentsAxis
= gtwn_CommercialLinesOfCreditMember
Construction loans:    
Loan commitments    
Unadvanced funds on loan 8,943gtwn_CommitmentsToUnadvancedPortionOfLoans
/ gtwn_LoanCommitmentsByNatureOfCommitmentsAxis
= us-gaap_ConstructionLoansMember		 16,153gtwn_CommitmentsToUnadvancedPortionOfLoans
/ gtwn_LoanCommitmentsByNatureOfCommitmentsAxis
= us-gaap_ConstructionLoansMember
Other unsecured personal lines of credit    
Loan commitments    
Unadvanced funds on loan 411gtwn_CommitmentsToUnadvancedPortionOfLoans
/ gtwn_LoanCommitmentsByNatureOfCommitmentsAxis
= gtwn_OtherUnsecuredPersonalLinesOfCreditMember		 452gtwn_CommitmentsToUnadvancedPortionOfLoans
/ gtwn_LoanCommitmentsByNatureOfCommitmentsAxis
= gtwn_OtherUnsecuredPersonalLinesOfCreditMember
Commercial real estate    
Loan commitments    
Unadvanced funds on loan 8,143gtwn_CommitmentsToUnadvancedPortionOfLoans
/ gtwn_LoanCommitmentsByNatureOfCommitmentsAxis
= us-gaap_CommercialRealEstateMember		 1,900gtwn_CommitmentsToUnadvancedPortionOfLoans
/ gtwn_LoanCommitmentsByNatureOfCommitmentsAxis
= us-gaap_CommercialRealEstateMember
Standby letters of credit    
Loan commitments    
Letters of credit 85us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ gtwn_LoanCommitmentsByNatureOfCommitmentsAxis
= us-gaap_StandbyLettersOfCreditMember		 $ 31us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ gtwn_LoanCommitmentsByNatureOfCommitmentsAxis
= us-gaap_StandbyLettersOfCreditMember
Standby letters of credit | Maximum    
Loan commitments    
Term of letters of credit 1 year