Huntington Bancshares Incorporated Annual report pursuant to Section 13 and 15(d)

AVAILABLE-FOR-SALE AND OTHER SECURITIES - Collateralized Debt Obligation Securities (Details)

AVAILABLE-FOR-SALE AND OTHER SECURITIES - Collateralized Debt Obligation Securities (Details) $ in Thousands	Dec. 31, 2015 USD ($) issuer	Dec. 31, 2014 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Unrealized Loss	$ (83,651)	$ (92,770)
Collateralized Debt Obligations
Schedule of Available-for-sale Securities [Line Items]
Par Value	179,574	193,597
Amortized Cost	131,991	139,194
Fair Value	100,338	82,738
Unrealized Loss	(31,654)	$ (56,456)
Collateralized Debt Obligations \| Alesco II
Schedule of Available-for-sale Securities [Line Items]
Par Value	41,646
Amortized Cost	28,022
Fair Value	25,296
Unrealized Loss	$ (2,727)
Number of Issuers Currently Performing \| issuer	30
Number of Issuers Currently Remaining \| issuer	32
Actual Deferrals and Defaults as a % of Original Collateral	5.00%
Expected Defaults as a % of Remaining Performing Collateral	7.00%
Available-for-sale Securities, Excess Subordination	4.00%
Collateralized Debt Obligations \| ICONS
Schedule of Available-for-sale Securities [Line Items]
Par Value	$ 19,214
Amortized Cost	19,214
Fair Value	15,567
Unrealized Loss	$ (3,647)
Number of Issuers Currently Performing \| issuer	19
Number of Issuers Currently Remaining \| issuer	21
Actual Deferrals and Defaults as a % of Original Collateral	7.00%
Expected Defaults as a % of Remaining Performing Collateral	14.00%
Available-for-sale Securities, Excess Subordination	52.00%
Collateralized Debt Obligations \| MM Comm III
Schedule of Available-for-sale Securities [Line Items]
Par Value	$ 4,684
Amortized Cost	4,475
Fair Value	3,682
Unrealized Loss	$ (793)
Number of Issuers Currently Performing \| issuer	5
Number of Issuers Currently Remaining \| issuer	8
Actual Deferrals and Defaults as a % of Original Collateral	5.00%
Expected Defaults as a % of Remaining Performing Collateral	6.00%
Available-for-sale Securities, Excess Subordination	36.00%
Collateralized Debt Obligations \| Pre TSL IX
Schedule of Available-for-sale Securities [Line Items]
Par Value	$ 5,000
Amortized Cost	3,955
Fair Value	3,009
Unrealized Loss	$ (946)
Number of Issuers Currently Performing \| issuer	27
Number of Issuers Currently Remaining \| issuer	38
Actual Deferrals and Defaults as a % of Original Collateral	18.00%
Expected Defaults as a % of Remaining Performing Collateral	10.00%
Available-for-sale Securities, Excess Subordination	7.00%
Collateralized Debt Obligations \| Pre TSL XI
Schedule of Available-for-sale Securities [Line Items]
Par Value	$ 25,000
Amortized Cost	20,155
Fair Value	15,418
Unrealized Loss	$ (4,737)
Number of Issuers Currently Performing \| issuer	42
Number of Issuers Currently Remaining \| issuer	55
Actual Deferrals and Defaults as a % of Original Collateral	16.00%
Expected Defaults as a % of Remaining Performing Collateral	9.00%
Available-for-sale Securities, Excess Subordination	10.00%
Collateralized Debt Obligations \| Pre TSL XIII
Schedule of Available-for-sale Securities [Line Items]
Par Value	$ 27,530
Amortized Cost	19,735
Fair Value	16,769
Unrealized Loss	$ (2,966)
Number of Issuers Currently Performing \| issuer	47
Number of Issuers Currently Remaining \| issuer	56
Actual Deferrals and Defaults as a % of Original Collateral	9.00%
Expected Defaults as a % of Remaining Performing Collateral	10.00%
Available-for-sale Securities, Excess Subordination	24.00%
Collateralized Debt Obligations \| Reg Diversified
Schedule of Available-for-sale Securities [Line Items]
Par Value	$ 25,500
Amortized Cost	5,435
Fair Value	1,994
Unrealized Loss	$ (3,441)
Number of Issuers Currently Performing \| issuer	23
Number of Issuers Currently Remaining \| issuer	39
Actual Deferrals and Defaults as a % of Original Collateral	33.00%
Expected Defaults as a % of Remaining Performing Collateral	7.00%
Available-for-sale Securities, Excess Subordination	0.00%
Collateralized Debt Obligations \| Soloso
Schedule of Available-for-sale Securities [Line Items]
Par Value	$ 31,000
Amortized Cost	31,000
Fair Value	18,603
Unrealized Loss	$ (12,397)
Number of Issuers Currently Performing \| issuer	30
Number of Issuers Currently Remaining \| issuer	40
Actual Deferrals and Defaults as a % of Original Collateral	19.00%
Expected Defaults as a % of Remaining Performing Collateral	9.00%
Available-for-sale Securities, Excess Subordination	40.00%