XML 102 R66.htm IDEA: XBRL DOCUMENT v2.4.1.9
Concentrations of Credit Risk (Details) (Commercial Real Estate and Commercial Construction and Land Development [Member], USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Commercial Real Estate and Commercial Construction and Land Development [Member]
 
Concentration Risk [Line Items]  
Commercial real estate loans and loan commitments $ 823.6us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= metr_CommercialRealEstateandCommercialConstructionandLandDevelopmentMember