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Foreclosed Assets (Details) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Financing Receivable, Impaired [Line Items]    
Foreclosed assets secured by consumer mortgage loans in process of foreclosure $ 1,700,000metr_MortgageLoansinProcessofForeclosureAmount  
Other Assets [Member]    
Financing Receivable, Impaired [Line Items]    
Foreclosed assets 7,900,000us-gaap_ForeclosedAssets
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember		 7,700,000us-gaap_ForeclosedAssets
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
Residential Real Estate [Member]    
Financing Receivable, Impaired [Line Items]    
Foreclosed assets $ 618,000us-gaap_ForeclosedAssets
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialRealEstateMember		 $ 295,000us-gaap_ForeclosedAssets
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialRealEstateMember