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Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2016

Dec. 31, 2015

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

		September 30, 2016
(Dollar amounts in thousands)		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
U.S. government agency securities		$	10,516			$	359			$	(12	)		$	10,863
Obligations of states and political subdivisions:
Taxable			1,616				186				—				1,802
Tax-exempt			81,829				3,899				(5	)			85,723
Mortgage-backed securities in government-sponsored entities			20,939				485				(44	)			21,380
Private-label mortgage-backed securities			1,927				141				—				2,068
Total debt securities			116,827				5,070				(61	)			121,836
Equity securities in financial institutions			750				468				—				1,218
Total		$	117,577			$	5,538			$	(61	)		$	123,054

		December 31, 2015
		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
U.S. government agency securities		$	21,655			$	245			$	(271	)		$	21,629
Obligations of states and political subdivisions:
Taxable			1,989				134				—				2,123
Tax-exempt			91,940				3,402				(175	)			95,167
Mortgage-backed securities in government-sponsored entities			24,480				316				(272	)			24,524
Private-label mortgage-backed securities			2,079				184				—				2,263
Total debt securities			142,143				4,281				(718	)			145,706
Equity securities in financial institutions			750				64				—				814
Total		$	142,893			$	4,345			$	(718	)		$	146,520

		December 31, 2015
(Dollar amounts in thousands)		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
U.S. government agency securities		$	21,655			$	245			$	(271	)		$	21,629
Obligations of states and political subdivisions:
Taxable			1,989				134				—				2,123
Tax-exempt			91,940				3,402				(175	)			95,167
Mortgage-backed securities in government-sponsored entities			24,480				316				(272	)			24,524
Private-label mortgage-backed securities			2,079				184				—				2,263
Total debt securities			142,143				4,281				(718	)			145,706
Equity securities in financial institutions			750				64				—				814
Total		$	142,893			$	4,345			$	(718	)		$	146,520

		December 31, 2014
(Dollar amounts in thousands)		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
U.S. government agency securities		$	23,035			$	311			$	(450	)		$	22,896
Obligations of states and political subdivisions:
Taxable			2,953				226				—				3,179
Tax-exempt			91,916				3,803				(553	)			95,166
Mortgage-backed securities in government-sponsored entities			29,150				475				(234	)			29,391
Private-label mortgage-backed securities			2,672				247				—				2,919
Total debt securities			149,726				5,062				(1,237	)			153,551
Equity securities in financial institutions			750				33				—				783
Total		$	150,476			$	5,095			$	(1,237	)		$	154,334

Investments Classified by Contractual Maturity Date [Table Text Block]

(Dollar amounts in thousands)		Amortized Cost				Fair Value
Due in one year or less		$	2,842			$	2,879
Due after one year through five years			9,132				9,500
Due after five years through ten years			12,916				13,510
Due after ten years			91,937				95,947
Total		$	116,827			$	121,836

(Dollar amounts in thousands)		Amortized Cost				Fair Value
Due in one year or less		$	1,135			$	1,153
Due after one year through five years			10,790				10,890
Due after five years through ten years			19,172				19,830
Due after ten years			111,042				113,833
Total		$	142,139			$	145,706

Realized Gain (Loss) on Investments [Table Text Block]

		For the Three Months Ended September 30,								For the Nine Months Ended September 30,
(Dollar amounts in thousands)		2016				2015				2016				2015
Proceeds from sales		$	—			$	11,973			$	9,115			$	15,284
Gross realized gains			—				233				306				373
Gross realized losses			—				(22	)			(3	)			(116	)

		2015				2014				2013
Proceeds from sales		$	15,686			$	8,383			$	25,088
Gross realized gains			440				306				186
Gross realized losses			(117	)			(58	)			(175	)

Schedule of Unrealized Loss on Investments [Table Text Block]

		September 30, 2016
		Less than Twelve Months								Twelve Months or Greater								Total
(Dollar amounts in thousands)		Fair Value				Gross Unrealized Losses				Fair Value				Gross Unrealized Losses				Fair Value				Gross Unrealized Losses
U.S. government agency securities		$	2,000			$	—			$	1,465			$	(12	)		$	3,465			$	(12	)
Obligations of states and political subdivisions
Tax-exempt			608				—				—				(5	)			608				(5	)
Mortgage-backed securities in government-sponsored entities			—				—				4,709				(44	)			4,709				(44	)
Private-label mortgage-backed securities			75				—				—				—				75				—
Total		$	2,683			$	—			$	6,174			$	(61	)		$	8,857			$	(61	)

		December 31, 2015
		Less than Twelve Months								Twelve Months or Greater								Total
		Fair Value				Gross Unrealized Losses				Fair Value				Gross Unrealized Losses				Fair Value				Gross Unrealized Losses
U.S. government agency securities		$	3,818			$	(57	)		$	10,872			$	(214	)		$	14,690			$	(271	)
Obligations of states and political subdivisions
Tax-exempt			1,268				(9	)			9,394				(166	)			10,662				(175	)
Mortgage-backed securities in government-sponsored entities			8,725				(86	)			6,685				(186	)			15,410				(272	)
Total		$	13,811			$	(152	)		$	26,951			$	(566	)		$	40,762			$	(718	)

		December 31, 2015
		Less than Twelve Months								Twelve Months or Greater								Total
(Dollar amounts in thousands)		Fair Value				Gross Unrealized Losses				Fair Value				Gross Unrealized Losses				Fair Value				Gross Unrealized Losses
U.S. government agency securities		$	3,818			$	(57	)		$	10,872			$	(214	)		$	14,690			$	(271	)
Obligations of states and political subdivisions
Tax-exempt			1,268				(9	)			9,394				(166	)			10,662				(175	)
Mortgage-backed securities in government-sponsored entities			8,725				(86	)			6,685				(186	)			15,410				(272	)
Total		$	13,811			$	(152	)		$	26,951			$	(566	)		$	40,762			$	(718	)

		December 31, 2014
		Less than Twelve Months								Twelve Months or Greater								Total
(Dollar amounts in thousands)		Fair Value				Gross Unrealized Losses				Fair Value				Gross Unrealized Losses				Fair Value				Gross Unrealized Losses
U.S. government agency securities		$	—			$	—			$	15,734			$	(450	)		$	15,734			$	(450	)
Obligations of states and political subdivisions
Tax-exempt			2,406				(10	)			18,232				(543	)			20,638				(553	)
Mortgage-backed securities in government-sponsored entities			—				—				16,774				(234	)			16,774				(234	)
Total		$	2,406			$	(10	)		$	50,740			$	(1,227	)		$	53,146			$	(1,237	)

X

- Definition

Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.

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Tabular disclosure of realized gains and losses on investments reported in the statement of income.

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For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27290-111563

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