Securities (Details 3) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013 item	Dec. 31, 2012
Securities
Less than 12 Months, Fair Value	$ 81,968	$ 24,023
Less than 12 Months, Gross Unrealized Losses	1,094	650
12 Months or Greater, Fair Value	4,403	4,551
12 Months or Greater, Gross Unrealized Losses	468	425
Total, Fair Value	86,371	28,574
Total, Gross Unrealized Losses	1,562	1,075
Number of securities in an unrealized loss position	71
Obligations of state and political subdivisions
Securities
Less than 12 Months, Fair Value	14,314	8,649
Less than 12 Months, Gross Unrealized Losses	643	398
12 Months or Greater, Fair Value	3,988	4,139
12 Months or Greater, Gross Unrealized Losses	383	335
Total, Fair Value	18,302	12,788
Total, Gross Unrealized Losses	1,026	733
Number of nonrated bonds that were considered investment grade	2
Government sponsored agency/ collateralized mortgage obligations
Securities
Less than 12 Months, Fair Value	10,166	1,485
Less than 12 Months, Gross Unrealized Losses	112	13
12 Months or Greater, Fair Value		2
Total, Fair Value	10,166	1,487
Total, Gross Unrealized Losses	112	13
Government sponsored agency/ residential mortgage-backed securities
Securities
Less than 12 Months, Fair Value	56,504	12,899
Less than 12 Months, Gross Unrealized Losses	323	229
Total, Fair Value	56,504	12,899
Total, Gross Unrealized Losses	323	229
Corporate debt securities
Securities
12 Months or Greater, Fair Value	415	410
12 Months or Greater, Gross Unrealized Losses	85	90
Total, Fair Value	415	410
Total, Gross Unrealized Losses	85	90
Equity securities
Securities
Less than 12 Months, Fair Value	984	990
Less than 12 Months, Gross Unrealized Losses	16	10
Total, Fair Value	984	990
Total, Gross Unrealized Losses	$ 16	$ 10