Huntington Bancshares Incorporated Quarterly report pursuant to Section 13 or 15(d)

Available-for-Sale and Other Securities (Trust Preferred) (Details 3)

Available-for-Sale and Other Securities (Trust Preferred) (Details 3) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Trust Preferred Securities Data [Line Items]
Total investment securities, Unrealized Gross Losses	$ 134,049	$ 122,768
Pooled Trust Preferred [Member]
Trust Preferred Securities Data [Line Items]
Par Value	233,639	266,863
Amortized Cost	172,735	195,760
Fair Value	91,925	84,296
Total investment securities, Unrealized Gross Losses	(80,810)	(111,464)
Pooled Trust Preferred [Member] \| Alesco II [Member]
Trust Preferred Securities Data [Line Items]
Par Value	41,646
Amortized Cost	29,830
Fair Value	12,789
Total investment securities, Unrealized Gross Losses	(17,041)
Lowest Credit Rating	C
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	10.00%
Expected Defaults as Percent of Remaining Performing Collateral	9.00%
Excess Subordination	0.00%
Pooled Trust Preferred [Member] \| ICONS [Member]
Trust Preferred Securities Data [Line Items]
Par Value	20,000
Amortized Cost	20,000
Fair Value	15,192
Total investment securities, Unrealized Gross Losses	(4,808)
Lowest Credit Rating	BB
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	3.00%
Expected Defaults as Percent of Remaining Performing Collateral	13.00%
Excess Subordination	52.00%
Pooled Trust Preferred [Member] \| I-Pre TSL II [Member]
Trust Preferred Securities Data [Line Items]
Par Value	20,464
Amortized Cost	20,413
Fair Value	18,201
Total investment securities, Unrealized Gross Losses	(2,212)
Lowest Credit Rating	A
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	5.00%
Expected Defaults as Percent of Remaining Performing Collateral	10.00%
Excess Subordination	77.00%
Pooled Trust Preferred [Member] \| MM Comm III [Member]
Trust Preferred Securities Data [Line Items]
Par Value	7,162
Amortized Cost	6,843
Fair Value	5,229
Total investment securities, Unrealized Gross Losses	(1,614)
Lowest Credit Rating	BB
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	5.00%
Expected Defaults as Percent of Remaining Performing Collateral	9.00%
Excess Subordination	27.00%
Pooled Trust Preferred [Member] \| Pre TSL IX [Member]
Trust Preferred Securities Data [Line Items]
Par Value	5,000
Amortized Cost	3,955
Fair Value	1,889
Total investment securities, Unrealized Gross Losses	(2,066)
Lowest Credit Rating	C
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	20.00%
Expected Defaults as Percent of Remaining Performing Collateral	13.00%
Excess Subordination	4.00%
Pooled Trust Preferred [Member] \| Pre TSL X [Member]
Trust Preferred Securities Data [Line Items]
Par Value	17,149
Amortized Cost	8,551
Fair Value	5,702
Total investment securities, Unrealized Gross Losses	(2,849)
Lowest Credit Rating	C
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	25.00%
Expected Defaults as Percent of Remaining Performing Collateral	12.00%
Excess Subordination	0.00%
Pooled Trust Preferred [Member] \| Pre TSL XI [Member]
Trust Preferred Securities Data [Line Items]
Par Value	25,000
Amortized Cost	21,216
Fair Value	8,243
Total investment securities, Unrealized Gross Losses	(12,973)
Lowest Credit Rating	C
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	28.00%
Expected Defaults as Percent of Remaining Performing Collateral	15.00%
Excess Subordination	0.00%
Pooled Trust Preferred [Member] \| Pre TSL XIII [Member]
Trust Preferred Securities Data [Line Items]
Par Value	28,218
Amortized Cost	21,579
Fair Value	11,363
Total investment securities, Unrealized Gross Losses	(10,216)
Lowest Credit Rating	C
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	28.00%
Expected Defaults as Percent of Remaining Performing Collateral	22.00%
Excess Subordination	4.00%
Pooled Trust Preferred [Member] \| Reg Diversified [Member]
Trust Preferred Securities Data [Line Items]
Par Value	25,500
Amortized Cost	6,908
Fair Value	561
Total investment securities, Unrealized Gross Losses	(6,347)
Lowest Credit Rating	D
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	40.00%
Expected Defaults as Percent of Remaining Performing Collateral	12.00%
Excess Subordination	0.00%
Pooled Trust Preferred [Member] \| Soloso [Member]
Trust Preferred Securities Data [Line Items]
Par Value	12,500
Amortized Cost	2,440
Fair Value	127
Total investment securities, Unrealized Gross Losses	(2,313)
Lowest Credit Rating	C
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	32.00%
Expected Defaults as Percent of Remaining Performing Collateral	22.00%
Excess Subordination	0.00%
Pooled Trust Preferred [Member] \| Tropic III [Member]
Trust Preferred Securities Data [Line Items]
Par Value	31,000
Amortized Cost	31,000
Fair Value	12,629
Total investment securities, Unrealized Gross Losses	$ (18,371)
Lowest Credit Rating	CCC+
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	29.00%
Expected Defaults as Percent of Remaining Performing Collateral	17.00%
Excess Subordination	38.00%