Investments (Unrealized gain/loss on investments) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Schedule of Investments [Line Items]
Amortized Cost	$ 130,898	$ 123,874
Gross Unrealized Gains	4,167	3,893
Gross Unrealized Losses	(2,261)	(2,466)
Fair Value	132,804	125,301
Equity securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	2,105	2,105
Gross Unrealized Gains	90	11
Gross Unrealized Losses	(272)	(357)
Fair Value	1,923	1,759
U.S. Government agency securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	12,219	13,159
Gross Unrealized Gains	105	75
Gross Unrealized Losses	(26)	(5)
Fair Value	12,298	13,229
Municipal securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	54,684	42,490
Gross Unrealized Gains	2,902	2,598
Gross Unrealized Losses	(118)	(7)
Fair Value	57,468	45,081
Corporate debt securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	2,251	2,484
Gross Unrealized Gains	26	49
Gross Unrealized Losses	(52)	(119)
Fair Value	2,225	2,414
Trust preferred securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	5,898	5,890
Gross Unrealized Losses	(1,352)	(1,272)
Fair Value	4,546	4,618
Agency mortgage-backed securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	50,788	54,314
Gross Unrealized Gains	1,044	1,159
Gross Unrealized Losses	(121)	(188)
Fair Value	51,711	55,285
Private-label mortgage-backed securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	2,890	3,366
Gross Unrealized Gains		1
Gross Unrealized Losses	(304)	(500)
Fair Value	2,586	2,867
Asset-backed securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	63	66
Gross Unrealized Losses	(16)	(18)
Fair Value	$ 47	$ 48