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Investments (Unrealized Gain (Loss) on Investments) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Investments [Line Items]
Amortized Cost	$ 155,419	$ 149,561
Gross Unrealized Gains	422	269
Gross Unrealized Losses	6,681	9,830
Investment securities - available-for-sale (at fair value)	149,160	140,000
OTTI in AOCI	(3,556)	(3,961)
Held-to-maturity amortized cost	95,975	97,169
Held-to-maturity Gross Unrealized Gains	2,559	1,410
Held-to-maturity gross unrealized losses	351	598
Investment securities - HTM	98,183	97,981
Held-to-maturity OTTI in AOCI	0	0
US government agencies [Member]
Schedule of Investments [Line Items]
Amortized Cost	30,000	25,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	521	747
Investment securities - available-for-sale (at fair value)	29,479	24,253
OTTI in AOCI	0	0
Held-to-maturity amortized cost	15,841	15,738
Held-to-maturity Gross Unrealized Gains	609	512
Held-to-maturity gross unrealized losses	0	0
Investment securities - HTM	16,450	16,250
Held-to-maturity OTTI in AOCI	0	0
Residential mortgage-backed agencies [Member]
Schedule of Investments [Line Items]
Held-to-maturity amortized cost	50,019	50,384
Held-to-maturity Gross Unrealized Gains	239	160
Held-to-maturity gross unrealized losses	301	279
Investment securities - HTM	49,957	50,265
Held-to-maturity OTTI in AOCI	0	0
Commercial mortgage-backed agencies [Member]
Schedule of Investments [Line Items]
Amortized Cost	42,417	52,978
Gross Unrealized Gains	0	1
Gross Unrealized Losses	594	757
Investment securities - available-for-sale (at fair value)	41,823	52,222
OTTI in AOCI	0	0
Held-to-maturity amortized cost	17,364	17,584
Held-to-maturity Gross Unrealized Gains	385	248
Held-to-maturity gross unrealized losses	0	0
Investment securities - HTM	17,749	17,832
Held-to-maturity OTTI in AOCI	0	0
Collateralized mortgage obligations [Member]
Schedule of Investments [Line Items]
Amortized Cost	42,372	19,953
Gross Unrealized Gains	3	13
Gross Unrealized Losses	489	399
Investment securities - available-for-sale (at fair value)	41,886	19,567
OTTI in AOCI	0	0
Held-to-maturity amortized cost	4,241	4,833
Held-to-maturity Gross Unrealized Gains	0	0
Held-to-maturity gross unrealized losses	50	149
Investment securities - HTM	4,191	4,684
Held-to-maturity OTTI in AOCI	0	0
Obligations of states and political subdivisions [Member]
Schedule of Investments [Line Items]
Amortized Cost	20,911	23,700
Gross Unrealized Gains	419	255
Gross Unrealized Losses	76	251
Investment securities - available-for-sale (at fair value)	21,254	23,704
OTTI in AOCI	0	0
Held-to-maturity amortized cost	8,510	8,630
Held-to-maturity Gross Unrealized Gains	1,326	490
Held-to-maturity gross unrealized losses	0	170
Investment securities - HTM	9,836	8,950
Held-to-maturity OTTI in AOCI	0	0
Collateralized debt obligations [Member]
Schedule of Investments [Line Items]
Amortized Cost	19,719	27,930
Gross Unrealized Gains	0	0
Gross Unrealized Losses	5,001	7,676
Investment securities - available-for-sale (at fair value)	14,718	20,254
OTTI in AOCI	$ (3,556)	$ (3,961)

X

- Definition

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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