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Securities (Tables)

12 Months Ended

Dec. 31, 2017

Investments debt and equity securities [Abstract]

Available-for-sale Securities [Table Text Block]

			1 year	1 to 5	5 to 10	After 10	Fair		Gross Unrealized			Amortized
(Dollars in thousands)			or less	years	years	years	Value		Gains	Losses		Cost
December 31, 2017
Agency obligations (a)		$	—	29,253	23,809	—	53,062		79	904		$	53,887
Agency RMBS (a)			—	—	11,201	121,871	133,072		330	1,639			134,381
State and political subdivisions			—	2,564	9,999	59,000	71,563		1,616	237			70,184
	Total available-for-sale	$	—	31,817	45,009	180,871	257,697		2,025	2,780		$	258,452
December 31, 2016
Agency obligations (a)		$	3,047	22,531	19,893	—	45,471		331	973		$	46,113
Agency RMBS (a)			—	972	16,171	110,644	127,787		551	1,805		$	129,041
State and political subdivisions			—	2,480	10,210	57,624	70,314		1,509	734		$	69,539
	Total available-for-sale	$	3,047	25,983	46,274	168,268	243,572		2,391	3,512		$	244,693
(a) Includes securities issued by U.S. government agencies or government sponsored entities.

Available-for-sale Securities, Continuous Unrealized Loss Position [Table Text Block]

				Less than 12 Months						12 Months or Longer						Total
				Fair			Unrealized			Fair			Unrealized			Fair			Unrealized
(Dollars in thousands)				Value			Losses			Value			Losses			Value			Losses
December 31, 2017:
Agency obligations			$	14,381			99			20,353			805			34,734		$	904
Agency RMBS				53,440			363			50,729			1,276			104,169			1,639
State and political subdivisions				2,009			22			10,155			215			12,164			237
		Total	$	69,830			484			81,237			2,296			151,067		$	2,780

December 31, 2016:
Agency obligations			$	20,352			973			—			—			20,352		$	973
Agency RMBS				89,062			1,805			—			—			89,062			1,805
State and political subdivisions				20,444			734			—			—			20,444			734
		Total	$	129,858			3,512			—			—			129,858		$	3,512

Schedule of Realized Gain (Loss) [Table Text Block]

Realized Gains and Losses
The following table presents the gross realized gains and losses on sales related to securities.
				Year ended December 31
(Dollars in thousands)				2017			2016
Gross realized gains			$	51			166
Gross realized losses				—			(387)
	Realized gains (losses), net		$	51			(221)

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Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 2
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Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales.

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