Securities (Details 2) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Unrealized loss
Number of investments	48	15
Fair value	$ 29,217	$ 9,845
Unrealized losses	609	80
Collateralized Debt Obligations [Member]
Unrealized loss
Number of investments	1
Fair value	1,004
Unrealized losses	912
Less than 12 months [Member]
Unrealized loss
Number of investments	46	15
Fair value Less than 12 months	28,243	9,845
Unrealized losses Less than 12 months	596	80
Less than 12 months [Member] | Collateralized Debt Obligations [Member]
Unrealized loss
Number of investments	0
Fair value Less than 12 months	0
Unrealized losses Less than 12 months	0
12 months or longer [Member]
Unrealized loss
Number of investments	2	0
Fair value, 12 months or longer	974	0
Unrealized losses, 12 months or longer	13	0
12 months or longer [Member] | Collateralized Debt Obligations [Member]
Unrealized loss
Number of investments	1
Fair value, 12 months or longer	1,004
Unrealized losses, 12 months or longer	912
U.S. Government and agency obligations [Member]
Unrealized loss
Number of investments	9	3
Fair value	8,968	3,649
Unrealized losses	156	18
U.S. Government and agency obligations [Member] | Less than 12 months [Member]
Unrealized loss
Number of investments	9	3
Fair value Less than 12 months	8,968	3,649
Unrealized losses Less than 12 months	156	18
U.S. Government and agency obligations [Member] | 12 months or longer [Member]
Unrealized loss
Number of investments	0	0
Fair value, 12 months or longer	0	0
Unrealized losses, 12 months or longer	0	0
Corporate bonds [Member]
Unrealized loss
Number of investments	6	1
Fair value	2,497	501
Unrealized losses	58	2
Corporate bonds [Member] | Less than 12 months [Member]
Unrealized loss
Number of investments	6	1
Fair value Less than 12 months	2,497	501
Unrealized losses Less than 12 months	58	2
Corporate bonds [Member] | 12 months or longer [Member]
Unrealized loss
Number of investments	0	0
Fair value, 12 months or longer	0	0
Unrealized losses, 12 months or longer	0	0
State and municipal obligations [Member]
Unrealized loss
Number of investments	18	5
Fair value	6,469	1,630
Unrealized losses	163	31
State and municipal obligations [Member] | Less than 12 months [Member]
Unrealized loss
Number of investments	17	5
Fair value Less than 12 months	5,971	1,630
Unrealized losses Less than 12 months	152	31
State and municipal obligations [Member] | 12 months or longer [Member]
Unrealized loss
Number of investments	1	0
Fair value, 12 months or longer	498	0
Unrealized losses, 12 months or longer	11	0
Mortgage-backed securities and other [Member]
Unrealized loss
Number of investments	15	6
Fair value	11,283	4,065
Unrealized losses	232	29
Mortgage-backed securities and other [Member] | Less than 12 months [Member]
Unrealized loss
Number of investments	14	6
Fair value Less than 12 months	10,807	4,065
Unrealized losses Less than 12 months	230	29
Mortgage-backed securities and other [Member] | 12 months or longer [Member]
Unrealized loss
Number of investments	1	0
Fair value, 12 months or longer	476	0
Unrealized losses, 12 months or longer	$ 2	$ 0