Securities (Details 3) (USD $) In Thousands, unless otherwise specified												3 Months Ended
	Sep. 30, 2013		Jun. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011	Sep. 30, 2013 Pooled Trust Preferred Securities [Member]		Sep. 30, 2013 Private mortgage-backed securities [Member]		Sep. 30, 2013 Trust Preferred Security A [Member] Pooled Trust Preferred Securities [Member]		Sep. 30, 2013 Trust Preferred Security B [Member] Pooled Trust Preferred Securities [Member]		Sep. 30, 2013 Trust Preferred Security C [Member] Pooled Trust Preferred Securities [Member]		Sep. 30, 2013 Trust Preferred Security D [Member] Pooled Trust Preferred Securities [Member]		Sep. 30, 2013 Trust Preferred Security E [Member] Pooled Trust Preferred Securities [Member]		Sep. 30, 2013 Trust Preferred Security F [Member] Pooled Trust Preferred Securities [Member]		Sep. 30, 2013 Trust Preferred Security G [Member] Pooled Trust Preferred Securities [Member]		Sep. 30, 2013 Private Mortgage Backed-Securities-One [Member] Private mortgage-backed securities [Member]		Sep. 30, 2013 Private Mortgage-Backed Securities-Two [Member] Private mortgage-backed securities [Member]
Summary of pertinent information
Class												C1		D		C1		D		C1		B		A1		2A1		A19
Amortized Cost	$ 10,712	[1]						$ 8,113	[1]	$ 2,599	[1]	$ 1,283	[1]		[1]	$ 506	[1]		[1]	$ 2,081	[1]	$ 1,833	[1]	$ 2,410	[1]	$ 1,835	[1]	$ 764	[1]
Gross Unrealized Gain/(Loss)	(1,900)							(1,900)														(1,028)		(872)
Non-Credit Related Other-Than Temporary (Impairment)/Recovery	(1,978)							(2,242)		264		(757)				(307)				(1,178)						165		99
Fair Value	6,834							3,971		2,863		526				199				903		805		1,538		2,000		863
Total Cumulative Credit Related Other- Than- Temporary Impairment	(10,847)		(10,847)	(10,847)	(10,847)	(10,847)	(10,771)	(9,996)		(851)		(3,676)		(3,481)		(482)		(989)		(1,368)						(766)		(85)
Total Cumulative Other- Than- Temporary (Impairment)/Recovery to Date	$ (12,825)							$ (12,238)		$ (587)		$ (4,433)		$ (3,481)		$ (789)		$ (989)		$ (2,546)						$ (601)		$ 14

[1] The amortized cost reflects previously recorded OTTI charges recognized in earnings for the applicable securities.