Investments (Unrealized Gain (Loss) on Investments) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Schedule of Investments [Line Items]
Amortized Cost	$ 234,683	$ 231,745
Gross Unrealized Gains	5,346	3,344
Gross Unrealized Losses	12,234	13,972
Investment securities - available-for-sale (at fair value)	227,795us-gaap_AvailableForSaleSecurities	221,117us-gaap_AvailableForSaleSecurities	221,117us-gaap_AvailableForSaleSecurities
OTTI in AOCI	3,532	6,143
Held-to-maturity amortized cost	109,040us-gaap_HeldToMaturitySecurities	109,449us-gaap_HeldToMaturitySecurities	109,449us-gaap_HeldToMaturitySecurities
Held-to-maturity Gross Unrealized Gains	2,511	1,444
Held-to-maturity gross unrealized losses	231	122
Investment securities - HTM	111,320	110,771	110,771
Held-to-maturity OTTI in AOCI	0	0
U.S. Treasury [Member]
Schedule of Investments [Line Items]
Amortized Cost	27,083	29,607
Gross Unrealized Gains	14	0
Gross Unrealized Losses	0	11
Investment securities - available-for-sale (at fair value)	27,097	29,596
OTTI in AOCI	0	0
US government agencies [Member]
Schedule of Investments [Line Items]
Amortized Cost	44,067	39,077
Gross Unrealized Gains	226	117
Gross Unrealized Losses	75	253
Investment securities - available-for-sale (at fair value)	44,218	38,941
OTTI in AOCI	0	0
Held-to-maturity amortized cost	24,566	24,520
Held-to-maturity Gross Unrealized Gains	911	514
Held-to-maturity gross unrealized losses	0	0
Investment securities - HTM	25,477	25,034
Held-to-maturity OTTI in AOCI	0
Residential mortgage-backed agencies [Member]
Schedule of Investments [Line Items]
Amortized Cost	28,774	45,175
Gross Unrealized Gains	478	510
Gross Unrealized Losses	244	412
Investment securities - available-for-sale (at fair value)	29,008	45,273
OTTI in AOCI	0	0
Held-to-maturity amortized cost	58,427	58,400
Held-to-maturity Gross Unrealized Gains	958	613
Held-to-maturity gross unrealized losses	34	5
Investment securities - HTM	59,351	59,008
Held-to-maturity OTTI in AOCI	0
Commercial mortgage-backed agencies [Member]
Schedule of Investments [Line Items]
Amortized Cost	36,636	26,007
Gross Unrealized Gains	439	53
Gross Unrealized Losses	29	103
Investment securities - available-for-sale (at fair value)	37,046	25,957
OTTI in AOCI	0	0
Held-to-maturity amortized cost	16,331	16,425
Held-to-maturity Gross Unrealized Gains	559	312
Held-to-maturity gross unrealized losses	0	0
Investment securities - HTM	16,890	16,737
Held-to-maturity OTTI in AOCI	0
Collateralized mortgage obligations [Member]
Schedule of Investments [Line Items]
Amortized Cost	14,028	8,611
Gross Unrealized Gains	161	96
Gross Unrealized Losses	0	0
Investment securities - available-for-sale (at fair value)	14,189	8,707
OTTI in AOCI	0	0
Held-to-maturity amortized cost	6,991	7,379
Held-to-maturity Gross Unrealized Gains	83	5
Held-to-maturity gross unrealized losses	0	0
Investment securities - HTM	7,074	7,384
Held-to-maturity OTTI in AOCI	0
Obligations of states and political subdivisions [Member]
Schedule of Investments [Line Items]
Amortized Cost	46,696	46,151
Gross Unrealized Gains	1,365	1,413
Gross Unrealized Losses	215	260
Investment securities - available-for-sale (at fair value)	47,846	47,304
OTTI in AOCI	0	0
Held-to-maturity amortized cost	2,725	2,725
Held-to-maturity Gross Unrealized Gains	0	0
Held-to-maturity gross unrealized losses	197	117
Investment securities - HTM	2,528	2,608
Held-to-maturity OTTI in AOCI	0
Collateralized debt obligations [Member]
Schedule of Investments [Line Items]
Amortized Cost	37,399	37,117
Gross Unrealized Gains	2,663	1,155
Gross Unrealized Losses	11,671	12,933
Investment securities - available-for-sale (at fair value)	28,391	25,339
OTTI in AOCI	$ 3,532	$ 6,143

Accumulated other comprehensive loss related to portion of other than temporary impairment (OTTI) due to factors other than credit losses on debt securities categorized as available-for-sale that an entity does not intend to sell and which it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis of the debt security. The amount represented by this item is net of tax, as applicable.

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