Fair Value Measurements (Details 1) (Significant Unobservable Inputs (Level 3) [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Dec. 31, 2011
Reconciliation for all assets and liabilities measured at fair value on a recurring basis
Beginning Balance	$ 7,493	$ 13,140	$ 17,303
GAINS AND LOSSES (REALIZED/UNREALIZED):
Included in Earnings	0	(76)	(243)
Included in Other Comprehensive Income	382	1,269	75
SETTLEMENTS	(711)	(2,256)	(3,995)
TRANSFERS INTO (OUT OF) OF LEVEL 3		(4,913)
Ending Balance	7,164	7,164	13,140
Pooled Trust Preferred Securities [Member]
Reconciliation for all assets and liabilities measured at fair value on a recurring basis
Beginning Balance	2,754	2,820	2,828
GAINS AND LOSSES (REALIZED/UNREALIZED):
Included in Earnings			(8)
Included in Other Comprehensive Income	332	286	37
SETTLEMENTS	(34)	(54)	(37)
TRANSFERS INTO (OUT OF) OF LEVEL 3
Ending Balance	3,052	3,052	2,820
Single Trust Preferred Securities [Member]
Reconciliation for all assets and liabilities measured at fair value on a recurring basis
Beginning Balance		4,210	4,221
GAINS AND LOSSES (REALIZED/UNREALIZED):
Included in Earnings
Included in Other Comprehensive Income		703	(11)
SETTLEMENTS
TRANSFERS INTO (OUT OF) OF LEVEL 3		(4,913)
Ending Balance			4,210
Private Mortgage-Backed Securities [Member]
Reconciliation for all assets and liabilities measured at fair value on a recurring basis
Beginning Balance	4,739	6,110	10,254
GAINS AND LOSSES (REALIZED/UNREALIZED):
Included in Earnings		(76)	(235)
Included in Other Comprehensive Income	50	280	49
SETTLEMENTS	(677)	(2,202)	(3,958)
TRANSFERS INTO (OUT OF) OF LEVEL 3
Ending Balance	$ 4,112	$ 4,112	$ 6,110