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	$ 260,055	$ 245,106
Gross Unrealized Gains	3,630	4,118
Gross Unrealized Losses	24,245	25,951
Fair Value	239,440	223,273
OTTI in AOCI	15,215	16,876
Held-to-maturity Amortized cost	4,040	4,040
US government agencies [Member]
Schedule of Investments [Line Items]
Amortized Cost	47,425	40,334
Gross Unrealized Gains	94	97
Gross Unrealized Losses	291	111
Fair Value	47,228	40,320
OTTI in AOCI	0	0
Residential mortgage-backed agencies [Member]
Schedule of Investments [Line Items]
Amortized Cost	81,432	43,596
Gross Unrealized Gains	681	703
Gross Unrealized Losses	695	191
Fair Value	81,418	44,108
OTTI in AOCI	0	0
Commercial mortgage-backed agencies [Member]
Schedule of Investments [Line Items]
Amortized Cost	14,934	37,330
Gross Unrealized Gains	92	288
Gross Unrealized Losses	0	0
Fair Value	15,026	37,618
OTTI in AOCI	0	0
Collateralized mortgage obligations [Member]
Schedule of Investments [Line Items]
Amortized Cost	23,054	31,836
Gross Unrealized Gains	246	188
Gross Unrealized Losses	21	293
Fair Value	23,279	31,731
OTTI in AOCI	0	0
Obligations of states and political subdivisions [Member]
Schedule of Investments [Line Items]
Amortized Cost	56,308	55,212
Gross Unrealized Gains	2,482	2,842
Gross Unrealized Losses	99	0
Fair Value	58,691	58,054
OTTI in AOCI	0	0
Held-to-maturity Amortized cost	4,040	4,040
Held-to-maturity ross Unrealized Gains	461	542
Held-to-maturity Gross Unrealized Losses	183	235
Held-to-maturity Securities, Fair Value	4,318	4,347
Held-to-maturity OTTI in AOCI	0	0
Collateralized debt obligations [Member]
Schedule of Investments [Line Items]
Amortized Cost	36,902	36,798
Gross Unrealized Gains	35	0
Gross Unrealized Losses	23,139	25,356
Fair Value	13,798	11,442
OTTI in AOCI	$ 15,215	$ 16,876