Investment Securities - Investments in continuous loss position (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities
Less Than 12 Months, Fair value	$ 27,165	$ 86,977
Less Than 12 Months, Unrealized losses	205	579
12 Months or More, Fair value	24,959	22,818
12 Months or More, Unrealized losses	309	543
Total, Fair value	52,124	109,795
Total, Unrealized losses	514	1,122
Government sponsored agencies - Residential mortgage-backed securities
Schedule of Available-for-sale Securities
Continuous unrealized loss investments, number of positions	1	3
Less Than 12 Months, Fair value	0	13,121
Less Than 12 Months, Unrealized losses	0	45
12 Months or More, Fair value	4,204	16,751
12 Months or More, Unrealized losses	12	348
Total, Fair value	4,204	29,872
Total, Unrealized losses	12	393
Government sponsored agencies - Collateralized mortgage obligations
Schedule of Available-for-sale Securities
Continuous unrealized loss investments, number of positions	1	2
Less Than 12 Months, Fair value	26,982	70,421
Less Than 12 Months, Unrealized losses	198	505
12 Months or More, Fair value	20,689	5,043
12 Months or More, Unrealized losses	252	87
Total, Fair value	47,671	75,464
Total, Unrealized losses	450	592
Private label collateralized mortgage obligations
Schedule of Available-for-sale Securities
Continuous unrealized loss investments, number of positions		1
Less Than 12 Months, Fair value	183	0
Less Than 12 Months, Unrealized losses	7	0
12 Months or More, Fair value	0	971
12 Months or More, Unrealized losses	0	57
Total, Fair value	183	971
Total, Unrealized losses	7	57
State and municipal securities
Schedule of Available-for-sale Securities
Less Than 12 Months, Fair value		3,429
Less Than 12 Months, Unrealized losses		28
12 Months or More, Fair value		0
12 Months or More, Unrealized losses		0
Total, Fair value		3,429
Total, Unrealized losses		28
Common and preferred stocks
Schedule of Available-for-sale Securities
Continuous unrealized loss investments, number of positions	2	1
Less Than 12 Months, Fair value	0	6
Less Than 12 Months, Unrealized losses	0	1
12 Months or More, Fair value	66	53
12 Months or More, Unrealized losses	45	51
Total, Fair value	66	59
Total, Unrealized losses	$ 45	$ 52