Investments (Schedule of Trust Preferred Securities) (Details) (USD $) In Thousands, unless otherwise specified			3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Trust Preferred Securities: Huntington Cap Trust [Member] Lowest Credit Rating Assigned: Standard & Poor's, BB Rating [Member]	Mar. 31, 2013 Trust Preferred Securities: Huntington Cap Trust II [Member] Lowest Credit Rating Assigned: Standard & Poor's, BB Rating [Member]	Mar. 31, 2013 Trust Preferred Securities: BankAmerica Cap III [Member] Lowest Credit Rating Assigned: Standard & Poor's, BB Rating [Member]	Mar. 31, 2013 Trust Preferred Securities: Wachovia Cap Trust II [Member] Lowest Credit Rating Assigned: Standard & Poor's, BBB+ Rating [Member]	Mar. 31, 2013 Trust Preferred Securities: Corestates Captl Tr II [Member] Lowest Credit Rating Assigned: Standard & Poor's, BBB+ Rating [Member]	Mar. 31, 2013 Trust Preferred Securities: Chase Cap VI JPM [Member] Lowest Credit Rating Assigned: Standard & Poor's, BBB Rating [Member]	Mar. 31, 2013 Trust Preferred Securities: Fleet Cap Tr V [Member] Lowest Credit Rating Assigned: Standard & Poor's, BB Rating [Member]	Mar. 31, 2013 Trust preferred securities [Member]	Dec. 31, 2012 Trust preferred securities [Member]
Schedule of Investments [Line Items]
Single Issuer or Polled			Single	Single	Single	Single	Single	Single	Single
Class			Preferred Stock	Preferred Stock	Preferred Stock	Preferred Stock	Preferred Stock	Preferred Stock	Preferred Stock
Amortized Cost	$ 132,112	$ 130,785	$ 934	$ 881	$ 959	$ 275	$ 930	$ 959	$ 973	$ 5,911	$ 5,905
Investment securities available for sale, at fair value	134,832	133,328	735	721	786	247	821	825	782	4,917	4,830
Gross Unrealized Gain (Loss)			$ (199)	$ (160)	$ (173)	$ (28)	$ (109)	$ (134)	$ (191)	$ (994)
Lowest Credit Rating Assigned			BB	BB	BB	BBB+	BBB+	BBB	BB
Number of Banks Currently Performing			1	1	1	1	1	1	1
Deferrals and Defaults as % of Original Collateral			0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
Expected Deferral/Defaults as a Percentage of Remaining Performing Collateral			0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%