Annual report pursuant to Section 13 and 15(d)

Fair Values of Assets and Liabilities (Details Textuals)

v2.4.1.9
Fair Values of Assets and Liabilities (Details Textuals) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2012
Dec. 31, 2013
Fair Values of Assets and Liabilities (Textuals) [Abstract]      
Federal Agencies: mortgage-backed securities transferred to held-to-maturity securities portfolio $ 292.2hban_FederalAgenciesMortgageBackedSecuritiesTransferredToHeldToMaturitySecuritiesPortfolio    
Asset-backed Securities [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Transfer out of Level 3 Assets   184.1us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AssetBackedSecuritiesMember 		 
Level 3 [Member] | Municipal securities [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Transfer in of Level 3 Assets   323.6us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MunicipalBondsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member 		 
Level 3 [Member] | Automobile Loan [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Transfer in of Level 3 Assets     $ 791.4us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AutomobileLoanMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member