Quarterly report pursuant to Section 13 or 15(d)

Fair Values of Assets and Liabilities (Non-recurring/fair values of financial instruments) (Details 5)

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Fair Values of Assets and Liabilities (Non-recurring/fair values of financial instruments) (Details 5) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2013
Carrying Amount [Member]
Dec. 31, 2012
Carrying Amount [Member]
Mar. 31, 2013
Fair Value [Member]
Dec. 31, 2012
Fair Value [Member]
Mar. 31, 2013
Level 1 [Member]
Fair Value [Member]
Dec. 31, 2012
Level 1 [Member]
Fair Value [Member]
Mar. 31, 2013
Level 2 [Member]
Fair Value [Member]
Dec. 31, 2012
Level 2 [Member]
Fair Value [Member]
Mar. 31, 2013
Level 3 [Member]
Fair Value [Member]
Dec. 31, 2012
Level 3 [Member]
Fair Value [Member]
Mar. 31, 2013
Total Estimated Fair Value [Member]
Fair Value [Member]
Dec. 31, 2012
Total Estimated Fair Value [Member]
Fair Value [Member]
Mar. 31, 2013
Nonrecurring Basis [Member]
Mar. 31, 2013
Nonrecurring Basis [Member]
Level 1 [Member]
Mar. 31, 2013
Nonrecurring Basis [Member]
Level 2 [Member]
Mar. 31, 2013
Nonrecurring Basis [Member]
Level 3 [Member]
Assets measured at fair value on a nonrecurring basis                                    
Fair value, Impaired loans                             $ 13,122 $ 0 $ 0 $ 13,122
Gain/(Losses), Impaired loans                             (3,320)      
Fair value, Accrued income and other assets                             25,139 0 0 25,139
Gain/(Losses), Accrued income and other assets                             (1,159)      
Financial Assets:                                    
Cash and short-term assets     900,005 1,333,727 900,005 1,333,727                        
Trading account securities 86,520 91,205 86,520 91,205 86,520 91,205                        
Loans held for sale 729,707 [1] 764,309 [1] 729,707 764,309 737,211 773,013 0 0 0 0 314,807 316,007 314,807 316,007        
Available-for-sale and other securities 7,504,639 7,566,175 7,504,639 7,566,175 7,504,639 7,566,175                        
Held-to-maturity securities, Total 1,693,074 1,743,876 1,693,074 1,743,876 1,733,454 1,794,105 0 0 1,733,454 1,794,105 0 0 1,733,454 1,794,105        
Net loans and direct financing leases 40,536,755 39,959,350 40,536,755 39,959,350 38,811,780 38,401,965 0 0 0 0 38,695,741 38,259,203 38,695,741 38,259,203        
Derivatives     330,731 385,697 330,731 385,697                        
Financial Liabilities:                                    
Deposits 46,867,141 46,252,683 46,867,141 46,252,683 46,953,781 46,330,715 0 0 40,136,635 39,136,127 6,817,146 7,194,588 46,953,781 46,330,715        
Short-term borrowings 732,705 589,814 732,705 589,814 726,310 584,671 0 0 0 0 726,310 584,671 726,310 584,671        
Federal Home Loan Bank advances 183,491 1,008,959 183,491 1,008,959 183,491 1,008,959                        
Other long term debt 156,301 158,784 156,301 158,784 154,156 156,719 0 0 0 2,124 154,156 154,595 154,156 156,719        
Subordinated notes 1,188,674 1,197,091 1,188,674 1,197,091 1,184,891 1,183,827 0 0 0 0 1,184,891 1,183,827 1,184,891 1,183,827        
Derivatives     $ 138,280 $ 152,188 $ 138,280 $ 152,188                        
[1] Amounts represent loans for which Huntington has elected the fair value option.