Investments (Unrealized gain (loss) on investments) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Schedule of Investments [Line Items]
Amortized Cost	$ 132,112	$ 130,785
Gross Unrealized Gains	4,241	4,271
Gross Unrealized Losses	(1,521)	(1,728)
Fair Value	134,832	133,328
Equity securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	2,104	2,104
Gross Unrealized Gains	217	92
Gross Unrealized Losses	(122)	(255)
Fair Value	2,199	1,941
U.S. Government agency securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	12,448	12,657
Gross Unrealized Gains	137	156
Gross Unrealized Losses	(10)	(4)
Fair Value	12,575	12,809
Municipal securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	57,647	58,395
Gross Unrealized Gains	2,833	2,984
Gross Unrealized Losses	(242)	(163)
Fair Value	60,238	61,216
Corporate debt securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	1,004	1,005
Gross Unrealized Losses	(5)	(11)
Fair Value	999	994
Trust preferred securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	5,911	5,905
Gross Unrealized Losses	(994)	(1,075)
Fair Value	4,917	4,830
Agency mortgage-backed securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	50,536	48,121
Gross Unrealized Gains	1,025	1,029
Gross Unrealized Losses	(101)	(84)
Fair Value	51,460	49,066
Private-label mortgage-backed securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	2,407	2,539
Gross Unrealized Gains	29	10
Gross Unrealized Losses	(37)	(123)
Fair Value	2,399	2,426
Asset-backed securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	55	59
Gross Unrealized Losses	(10)	(13)
Fair Value	$ 45	$ 46