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Equity Textuals (Details) (USD $)
In Millions, except Share data, unless otherwise specified
Dec. 31, 2014
Jun. 24, 2014
Dec. 31, 2013
Sep. 18, 2013
May 23, 2013
Statement of Stockholders' Equity [Abstract]          
Common Stock, Shares, Issued 32,774,420us-gaap_CommonStockSharesIssued 2,500,000us-gaap_CommonStockSharesIssued 29,789,825us-gaap_CommonStockSharesIssued 2,213,750us-gaap_CommonStockSharesIssued  
CommonStockIssuedOverAllotment   375,000chfc_CommonStockIssuedOverAllotment   288,750chfc_CommonStockIssuedOverAllotment  
Shares Issued, Price Per Share   $ 28.00us-gaap_SharesIssuedPricePerShare   $ 26.00us-gaap_SharesIssuedPricePerShare  
CommonStock, Value, Issued From Public Offering   $ 76.2chfc_CommonStockNetProceedsReceivedFromPublicOffering   $ 53.9chfc_CommonStockNetProceedsReceivedFromPublicOffering  
Stock Registered Under Universal Shelf Registration         100chfc_StockRegisteredUnderUniversalShelfRegistration
Amount of Common Stock sold in public stock offering   $ 80.5chfc_GrossValueofCommonStocksoldinpublicstockoffering   $ 57.6chfc_GrossValueofCommonStocksoldinpublicstockoffering