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
 9 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Sep. 30, 2013
Carrying Amount [Member]
Dec. 31, 2012
Carrying Amount [Member]
Sep. 30, 2013
Fair Value [Member]
Dec. 31, 2012
Fair Value [Member]
Sep. 30, 2013
Level 1 [Member]
Fair Value [Member]
Dec. 31, 2012
Level 1 [Member]
Fair Value [Member]
Sep. 30, 2013
Level 2 [Member]
Fair Value [Member]
Dec. 31, 2012
Level 2 [Member]
Fair Value [Member]
Sep. 30, 2013
Level 3 [Member]
Fair Value [Member]
Dec. 31, 2012
Level 3 [Member]
Fair Value [Member]
Sep. 30, 2013
Total Estimated Fair Value [Member]
Fair Value [Member]
Dec. 31, 2012
Total Estimated Fair Value [Member]
Fair Value [Member]
Sep. 30, 2013
Nonrecurring Basis [Member]
Sep. 30, 2013
Nonrecurring Basis [Member]
Level 1 [Member]
Sep. 30, 2013
Nonrecurring Basis [Member]
Level 2 [Member]
Sep. 30, 2013
Nonrecurring Basis [Member]
Level 3 [Member]
Assets measured at fair value on a nonrecurring basis                                    
Fair value, Impaired loans                             $ 36,326 $ 0 $ 0 $ 36,326
Gain/(Losses), Impaired loans                             (20,004)      
Fair value, Accrued income and other assets                             29,154 0 0 29,154
Gain/(Losses), Accrued income and other assets                             (1,165)      
Financial Assets:                                    
Cash and short-term assets     1,170,758 1,333,727 1,170,758 1,333,727                        
Trading account securities 74,167 91,205 74,167 91,205 74,167 91,205                        
Loans held for sale 345,621 [1] 764,309 [1] 345,621 764,309 345,621 773,013 0 0 0 0 0 0 0 0        
Available-for-sale and other securities 6,446,681 7,566,175 6,446,681 7,566,175 6,446,681 7,566,175                        
Held-to-maturity securities, Total 2,236,121 1,743,876 2,236,121 1,743,876 2,217,359 1,794,105 0 0 2,217,359 2,166,749 0 0 2,217,359 2,166,749        
Net loans and direct financing leases 41,889,803 39,959,350 41,889,803 39,959,350 39,786,532 38,401,965 0 0 0 0 39,716,961 39,265,242 39,716,961 39,265,242        
Derivatives     218,706 385,697 218,706 385,697                        
Financial Liabilities:                                    
Deposits 46,564,046 46,252,683 46,564,046 46,252,683 47,307,759 46,330,715 0 0 40,854,625 40,542,678 6,453,134 5,872,908 47,307,759 46,415,586        
Short-term borrowings 660,932 589,814 660,932 589,814 651,752 584,671 0 0 0 0 651,752 623,551 651,752 623,551        
Federal Home Loan Bank advances 333,352 1,008,959 333,352 1,008,959 333,631 1,008,959 0   0   333,631   333,631          
Other long term debt 904,668 158,784 904,668 158,784 918,390 156,719 0 0 0 0 918,390 154,578 918,390 154,578        
Subordinated notes 1,111,598 1,197,091 1,111,598 1,197,091 1,021,507 1,183,827 0 0 0 0 1,021,507 1,129,481 1,021,507 1,129,481        
Derivatives     $ 131,349 $ 152,188 $ 131,349 $ 152,188                        
[1] Amounts represent loans for which Huntington has elected the fair value option.