Quarterly report pursuant to Section 13 or 15(d)

Variable Interest Entities (Details)

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Variable Interest Entities (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Jun. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Jun. 30, 2013
Dec. 31, 2011
Assets              
Cash $ 1,107,658,000 $ 1,262,806,000          
Loans and leases 42,555,833,000 [1] 40,728,425,000 [1]          
Allowance for loan and lease losses (666,030,000) (769,075,000) (859,646,000)   (789,142,000) (733,076,000) (964,828,000)
Net loans and leases 41,889,803,000 39,959,350,000          
Accrued income and other assets 1,664,441,000 1,904,805,000          
Total assets 56,648,251,000 56,153,185,000          
Liabilities              
Other long term debt 904,668,000 158,784,000          
Accrued interest and other liabilities 1,112,076,000 1,155,643,000          
Total liabilities 50,686,672,000 50,362,974,000          
Variable Interest Entities (Textuals) [Abstract]              
Maximum year to defer payment of interest on debenture not exceeding five years time for a period            
Commitments to limited partnership interests, gross 524,700,000 532,100,000          
Commitments to limited partnership interests, net 367,800,000 391,900,000          
Funded Commitments to limited partnership interests 385,400,000 380,000,000          
Net sales of Low Income Housing Tax Credit Partnership investments         0    
Gain (loss) on net sales of Low Income Housing Tax Credit Partnership investments         0    
Total of automobile loans transferred in securitization transactions (not used)   1,000,000,000 1,300,000,000 1,000,000,000      
Consolidated Trusts [Member]
              
Assets              
Cash 88,140,000 103,690,000          
Loans and leases 258,651,000 498,924,000          
Allowance for loan and lease losses (793,000) (2,671,000)          
Net loans and leases 257,858,000 496,253,000          
Accrued income and other assets 1,109,000 2,258,000          
Total assets 347,107,000 602,201,000          
Liabilities              
Other long term debt 0 2,086,000          
Accrued interest and other liabilities 261,000 289,000          
Total liabilities 261,000 2,375,000          
2006 Automobile Trust [Member]
              
Assets              
Cash 79,153,000 91,113,000          
Loans and leases 188,871,000 356,162,000          
Allowance for loan and lease losses (793,000) (2,671,000)          
Net loans and leases 188,078,000 353,491,000          
Accrued income and other assets 565,000 1,353,000          
Total assets 267,796,000 445,957,000          
Liabilities              
Other long term debt 0 2,086,000          
Accrued interest and other liabilities 0 1,000          
Total liabilities 0 2,087,000          
2009 Automobile Trust [Member]
              
Assets              
Cash 8,987,000 12,577,000          
Loans and leases 69,780,000 142,762,000          
Allowance for loan and lease losses 0 0          
Net loans and leases 69,780,000 142,762,000          
Accrued income and other assets 283,000 617,000          
Total assets 79,050,000 155,956,000          
Liabilities              
Other long term debt 0 0          
Accrued interest and other liabilities 0 0          
Total liabilities 0 0          
Other Consolidated Trusts [Member]
              
Assets              
Cash 0 0          
Loans and leases 0 0          
Allowance for loan and lease losses 0 0          
Net loans and leases 0 0          
Accrued income and other assets 261,000 288,000          
Total assets 261,000 288,000          
Liabilities              
Other long term debt 0 0          
Accrued interest and other liabilities 261,000 288,000          
Total liabilities 261,000 288,000          
Unconsolidated Trusts [Member]
              
Carrying amount and classification of unconsolidated trusts assets and liabilities              
Total assets 480,768,000 526,058,000          
Total liabilities 517,187,000 529,941,000          
Maximum exposure to loss 467,004,000 512,294,000          
Trust Preferred Securities Total [Member]
              
Carrying amount and classification of unconsolidated trusts assets and liabilities              
Total assets 13,764,000 13,764,000          
Total liabilities 312,894,000 312,894,000          
Maximum exposure to loss 0 0          
2012-2 Automobile Trust [Member]
              
Carrying amount and classification of unconsolidated trusts assets and liabilities              
Total assets 8,750,000 13,616,000          
Total liabilities 0 0          
Maximum exposure to loss 8,750,000 13,616,000          
2012-1 Automobile Trust [Member]
              
Carrying amount and classification of unconsolidated trusts assets and liabilities              
Total assets 7,298,000 12,649,000          
Total liabilities 0 0          
Maximum exposure to loss 7,298,000 12,649,000          
2011 Automobile Trust [Member]
              
Carrying amount and classification of unconsolidated trusts assets and liabilities              
Total assets 3,827,000 7,076,000          
Total liabilities 0 0          
Maximum exposure to loss 3,827,000 7,076,000          
Tower Hill Securities [Member]
              
Carrying amount and classification of unconsolidated trusts assets and liabilities              
Total assets 79,312,000 87,075,000          
Total liabilities 65,000,000 65,000,000          
Maximum exposure to loss 79,312,000 87,075,000          
Low Income Housing Tax Credit Partnerships [Member]
              
Carrying amount and classification of unconsolidated trusts assets and liabilities              
Total assets 367,817,000 391,878,000          
Total liabilities 139,293,000 152,047,000          
Maximum exposure to loss $ 367,817,000 $ 391,878,000          
[1] Amounts represent certain assets of a consolidated VIE for which Huntington has elected the fair value option.