Investment Securities (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Fair value of investments with unrealized losses
Fair Value Less Than 12 Months	$ 61,352	$ 99,378
Unrealized Losses Less Than 12 Months	623	898
Fair Value 12 Months or longer	8,173	16,635
Unrealized Losses 12 Months or longer	488	1,551
Fair Value Total	69,525	116,013
Unrealized Losses Total	1,111	2,449
Obligations of states and political subdivisions [Member]
Fair value of investments with unrealized losses
Fair Value Less Than 12 Months	5,032
Unrealized Losses Less Than 12 Months	57
Fair Value 12 Months or longer
Unrealized Losses 12 Months or longer
Fair Value Total	5,032
Unrealized Losses Total	57
Mortgage-backed securities [Member]
Fair value of investments with unrealized losses
Fair Value Less Than 12 Months	20,968	25,011
Unrealized Losses Less Than 12 Months	201	81
Fair Value 12 Months or longer		2,880
Unrealized Losses 12 Months or longer		36
Fair Value Total	20,968	27,891
Unrealized Losses Total	201	117
SBA- backed securities [Member]
Fair value of investments with unrealized losses
Fair Value Less Than 12 Months	19,996	62,543
Unrealized Losses Less Than 12 Months	113	332
Fair Value 12 Months or longer
Unrealized Losses 12 Months or longer
Fair Value Total	19,996	62,543
Unrealized Losses Total	113	332
Corporate Bonds [Member]
Fair value of investments with unrealized losses
Fair Value Less Than 12 Months	15,356	11,824
Unrealized Losses Less Than 12 Months	252	485
Fair Value 12 Months or longer	8,173	13,755
Unrealized Losses 12 Months or longer	488	1,515
Fair Value Total	23,529	25,579
Unrealized Losses Total	$ 740	$ 2,000