Quarterly report pursuant to Section 13 or 15(d)

Variable Interest Entities (Trust preferred Securities) (Details 1)

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Variable Interest Entities (Trust preferred Securities) (Details 1) - USD ($)
$ in Thousands
 3 Months Ended
Jun. 30, 2015
Dec. 31, 2014
Summary of Outstanding Trust Preferred Securities    
Principal amount of subordinated note/ debenture issued to trust $ 317,090  
Investment in unconsolidated subsidiary $ 13,919  
Summary of Outstanding Trust Preferred Securities (Textuals) [Abstract]    
Variable rate basis three month LIBOR  
Unconsolidated Trusts [Member]    
Summary of Outstanding Trust Preferred Securities    
Maximum exposure to loss $ 531,152 $ 513,594
Sky Financial Capital Trust IV [Member]    
Summary of Outstanding Trust Preferred Securities    
Interest rate on Trust Preferred Securities [1] 1.67%  
Principal amount of subordinated note/ debenture issued to trust [2] $ 74,320  
Investment in unconsolidated subsidiary $ 2,320  
Summary of Outstanding Trust Preferred Securities (Textuals) [Abstract]    
Rate spread over three month LIBOR 1.40%  
Sky Financial Capital Trust III [Member]    
Summary of Outstanding Trust Preferred Securities    
Interest rate on Trust Preferred Securities [1] 1.68%  
Principal amount of subordinated note/ debenture issued to trust [2] $ 72,165  
Investment in unconsolidated subsidiary $ 2,165  
Summary of Outstanding Trust Preferred Securities (Textuals) [Abstract]    
Rate spread over three month LIBOR 1.40%  
Huntington Capital II [Member]    
Summary of Outstanding Trust Preferred Securities    
Interest rate on Trust Preferred Securities [3] 0.91%  
Principal amount of subordinated note/ debenture issued to trust [2] $ 54,593  
Investment in unconsolidated subsidiary $ 3,093  
Summary of Outstanding Trust Preferred Securities (Textuals) [Abstract]    
Rate spread over three month LIBOR 0.625%  
Huntington Capital I [Member]    
Summary of Outstanding Trust Preferred Securities    
Interest rate on Trust Preferred Securities [4] 0.98%  
Principal amount of subordinated note/ debenture issued to trust [2] $ 111,816  
Investment in unconsolidated subsidiary $ 6,186  
Summary of Outstanding Trust Preferred Securities (Textuals) [Abstract]    
Rate spread over three month LIBOR 0.70%  
Trust Preferred Securities Total [Member]    
Summary of Outstanding Trust Preferred Securities    
Maximum exposure to loss $ 0 0
2011 Automobile Trust [Member]    
Summary of Outstanding Trust Preferred Securities    
Maximum exposure to loss 386 944
Tower Hill Securities [Member]    
Summary of Outstanding Trust Preferred Securities    
Maximum exposure to loss 46,688 55,611
Low Income Housing Tax Credit Partnerships [Member]    
Summary of Outstanding Trust Preferred Securities    
Maximum exposure to loss 397,297 368,283
2012-1 Automobile Trust [Member]    
Summary of Outstanding Trust Preferred Securities    
Maximum exposure to loss 895 2,136
2012-2 Automobile Trust [Member]    
Summary of Outstanding Trust Preferred Securities    
Maximum exposure to loss $ 1,836 $ 3,220
Camco Trust [Member]    
Summary of Outstanding Trust Preferred Securities    
Interest rate on Trust Preferred Securities [5] 2.72%  
Principal amount of subordinated note/ debenture issued to trust [5] $ 4,196  
Investment in unconsolidated subsidiary $ 155  
[1] Variable effective rate at June 30, 2015, based on three month LIBOR + 1.40.
[2] Represents the principal amount of debentures issued to each trust, including unamortized original issue discount.
[3] Variable effective rate at June 30, 2015, based on three month LIBOR + 0.625.
[4] Variable effective rate at June 30, 2015, based on three month LIBOR + 0.70.
[5] Variable effective rate (including impact of purchase accounting accretion) at June 30, 2015, based on three month LIBOR + 1.33.