Securities (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013 item	Dec. 31, 2012 item
Fair value
Less than 12 months	$ 211,499	$ 48,897
12 months or more	14,316
Total	225,815	48,897
Unrealized losses
Less than 12 months	6,234	188
12 months or more	1,288
Total	7,522	188
Number of securities	155	14
Government sponsored enterprise obligations
Fair value
Less than 12 months	76,755	29,996
12 months or more	4,353
Total	81,108	29,996
Unrealized losses
Less than 12 months	1,429	56
12 months or more	443
Total	1,872	56
Mortgage-backed securities - government agencies
Fair value
Less than 12 months	112,652	16,609
12 months or more	8,752
Total	121,404	16,609
Unrealized losses
Less than 12 months	4,400	120
12 months or more	822
Total	5,222	120
Obligations of states and political subdivisions
Fair value
Less than 12 months	22,092	2,292
12 months or more	1,211
Total	23,303	2,292
Unrealized losses
Less than 12 months	405	12
12 months or more	23
Total	$ 428	$ 12