Investment Securities (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Fair value of investments with unrealized losses
Fair Value Less Than 12 Months	$ 39,238	$ 99,378
Unrealized Losses Less Than 12 Months	456	898
Fair Value 12 Months or longer	10,863	16,635
Unrealized Losses 12 Months or longer	195	1,551
Fair Value Total	50,101	116,013
Unrealized Losses Total	651	2,449
Obligations of states and political subdivisions [Member]
Fair value of investments with unrealized losses
Fair Value Less Than 12 Months	963
Unrealized Losses Less Than 12 Months	15
Fair Value 12 Months or longer
Unrealized Losses 12 Months or longer
Fair Value Total	963
Unrealized Losses Total	15
Mortgage-backed securities [Member]
Fair value of investments with unrealized losses
Fair Value Less Than 12 Months	24,033	25,011
Unrealized Losses Less Than 12 Months	324	81
Fair Value 12 Months or longer		2,880
Unrealized Losses 12 Months or longer		36
Fair Value Total	24,033	27,891
Unrealized Losses Total	324	117
SBA- backed securities [Member]
Fair value of investments with unrealized losses
Fair Value Less Than 12 Months	13,252	62,543
Unrealized Losses Less Than 12 Months	107	332
Fair Value 12 Months or longer	6,038
Unrealized Losses 12 Months or longer	20
Fair Value Total	19,290	62,543
Unrealized Losses Total	127	332
Corporate Bonds [Member]
Fair value of investments with unrealized losses
Fair Value Less Than 12 Months	990	11,824
Unrealized Losses Less Than 12 Months	10	485
Fair Value 12 Months or longer	4,825	13,755
Unrealized Losses 12 Months or longer	175	1,515
Fair Value Total	5,815	25,579
Unrealized Losses Total	$ 185	$ 2,000