Investment Securities (Tables)

12 Months Ended

Dec. 31, 2016

Investments, Debt and Equity Securities [Abstract]

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

The following tables present information related to the Company’s portfolio of securities available-for-sale and held-to-maturity at December 31, 2016 and 2015.

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(dollars in thousands)
December 31, 2016
Investment securities available-for-sale
Federal agency obligations	$	52,826	$	282	$	(271)	$	52,837
Residential mortgage pass-through securities		72,922		519		(944)		72,497
Commercial mortgage pass-through securities		4,186		23		-		4,209
Obligations of U.S. states and political subdivisions		148,747		2,789		(931)		150,605
Trust preferred securities		5,575		242		(151)		5,666
Corporate bonds and notes		36,717		586		(375)		36,928
Asset-backed securities		14,867		2		(286)		14,583
Certificates of deposit		973		10		-		983
Equity securities		376		192		-		568
Other securities		14,739		-		(325)		14,414
Total securities available-for-sale	$	351,928	$	4,645	$	(3,283)	$	353,290

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
December 31, 2015	(dollars in thousands)
Investment securities available-for-sale
Federal agency obligations	$	29,062	$	142	$	(58)	$	29,146
Residential mortgage pass-through securities		44,155		803		(48)		44,910
Commercial mortgage pass-through securities		2,981		-		(9)		2,972
Obligations of U.S. states and political subdivisions		8,188		169		-		8,357
Trust preferred securities		16,088		398		(231)		16,255
Corporate bonds and notes		53,566		702		(292)		53,976
Asset-backed securities		20,005		18		(298)		19,725
Certificates of deposit		1,895		18		(8)		1,905
Equity securities		376		21		(23)		374
Other securities		18,303		-		(153)		18,150
Total securities available-for-sale	$	194,619	$	2,271	$	(1,120)	$	195,770

		Amortized Cost		Gross Unrecognized Gains		Gross Unrecognized Losses		Fair Value
Investment securities held-to-maturity
U.S. Treasury and agency securities	$	28,471	$	755	$	-	$	29,226
Federal agency obligations		33,616		280		(119)		33,777
Residential mortgage-backed securities		3,805		11		(6)		3,810
Commercial mortgage-backed securities		4,110		27		(2)		4,135
Obligations of U.S. states and political subdivisions		118,015		5,001		(3)		123,013
Corporate bonds and notes		36,039		719		(161)		36,597
Total securities held-to-maturity	$	224,056	$	6,793	$	(291)	$	230,558

Investments Classified by Contractual Maturity Date [Table Text Block]

The following table presents information for investments in securities available-for-sale at December 31, 2016, based on scheduled maturities. Actual maturities can be expected to differ from scheduled maturities due to prepayment or early call options of the issuer. Securities not due at a single maturity date are shown separately. 

	December 31, 2016
	Amortized Cost		Fair Value
	(dollars in thousands)
Investment Securities Available-for-Sale:
Due in one year or less	$	5,003	$	5,054
Due after one year through five years		32,045		32,406
Due after five years through ten years		50,718		51,473
Due after ten years		171,939		172,669
Residential mortgage pass-through securities		72,922		72,497
Commercial mortgage pass-through securities		4,186		4,209
Equity securities		376		568
Other securities		14,739		14,414
Total securities available-for-sale	$	351,928	$	353,290

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

Gross gains and losses from the sales, calls, and maturities of investment securities for the years ended December 31, 2016, 2015 and 2014 were as follows (dollars in thousands): 

	Years Ended December 31,
	2016		2015		2014
Proceeds	$	85,253	$	65,231	$	81,844
Gross gains on sales of investment securities	$	4,234	$	3,931	$	2,837
Gross losses on sales of investment securities		-		-		19
Net gains on sales of investment securities		4,234		3,931		2,818
Less: tax provision on net gains		(1,682)		(1,564)		(986)
Net gains on sales of investment securities, after tax	$	2,552	$	2,367	$	1,832

Schedule of Unrealized Loss on Investments [Table Text Block]

The following tables indicate gross unrealized losses not recognized in income and fair value, aggregated by investment category and the length of time individual securities have been in a continuous unrealized loss position at December 31, 2016 and 2015. There were no investments held-to-maturity as of December 31, 2016.

	December 31, 2016
	Total				Less than 12 Months				12 Months or Longer
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
	(dollars in thousands)
Investment Securities    Available-for-Sale:
Federal agency obligation	$	22,672	$	(271)	$	21,416	$	(262)	$	1,256	$	(9)
Residential mortgage pass-through securities		50,136		(944)		49,817		(937)		319		(7)
Obligations of U.S. states and political subdivisions		52,307		(931)		52,307		(931)		-		-
Trust preferred securities		1,427		(151)		-		-		1,427		(151)
Corporate bonds and notes		15,930		(375)		7,671		(265)		8,259		(110)
Asset-backed securities		13,404		(286)		3,743		(88)		9,661		(198)
Other securities		11,467		(325)		-		-		11,467		(325)
Total Temporarily Impaired Securities	$	167,343	$	(3,283)	$	134,954	$	(2,483)	$	32,389	$	(800)

	December 31, 2015
	Total				Less than 12 Months				12 Months or Longer
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
	(dollars in thousands)
Investment Securities     Available-for-Sale:
Federal agency obligation	$	6,755	$	(50)	$	2,770	$	(9)	$	3,985	$	(41)
Residential mortgage pass-through securities		5,694		(11)		5,694		(11)		—		—
Trust preferred securities		1,307		(269)		—		—		1,307		(269)
Corporate bonds and notes		1,961		(11)		1,961		(11)		—		—
Asset-backed securities		9,773		(31)		9,773		(31)		—		—
Certificates of deposit		369		(2)		369		(2)		—		—
Equity securities		307		(69)		—		—		307		(69)
Other securities		5,417		(82)		1,978		(21)		3,439		(61)
Total	$	31,583	$	(525)	$	22,545	$	(85)	$	9,038	$	(440)
Investment Securities     Held-to-Maturity:
Federal agency obligation		3,228		(28)		3,228		(28)		—		—
Obligations of U.S. states and political subdivisions		8,341		(60)		1,401		(3)		6,940		(57)
Corporate bonds and notes		993		(7)		993		(7)		—		—
Total		12,562		(95)		5,622		(38)		6,940		(57)
Total Temporarily Impaired Securities	$	44,145	$	(620)	$	28,167	$	(123)	$	15,978	$	(497)