Investment Securities (Tables)

12 Months Ended

Dec. 31, 2018

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 at December 31, 2018 and 2017.

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(dollars in thousands)
December 31, 2018
Investment securities available-for-sale
Federal agency obligations	$	45,509	$	51	$	(605)	$	44,955
Residential mortgage pass-through securities		189,721		85		(4,602)		185,204
Commercial mortgage pass-through securities		3,919		-		(45)		3,874
Obligations of U.S. states and political subdivisions		141,496		1,091		(3,402)		139,185
Trust preferred securities		-		-		-		-
Corporate bonds and notes		26,308		45		(540)		25,813
Asset-backed securities		9,685		22		(16)		9,691
Certificates of deposit		319		3		-		322
Other securities		2,990		-		-		2,990
Total securities available-for-sale	$	419,947	$	1,297	$	(9,210)	$	412,034

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
December 31, 2017	(dollars in thousands)
Investment securities available-for-sale
Federal agency obligations	$	56,297	$	141	$	(416)	$	56,022
Residential mortgage pass-through securities		183,509		330		(1,948)		181,891
Commercial mortgage pass-through securities		4,054		3		(3)		4,054
Obligations of U.S. states and political subdivisions		130,723		1,739		(1,334)		131,128
Trust preferred securities		4,577		205		(111)		4,671
Corporate bonds and notes		29,801		163		(271)		29,693
Asset-backed securities		12,021		66		(37)		12,050
Certificates of deposit		621		4		-		625
Equity securities		11,843		235		(350)		11,728
Other securities		3,422		-		-		3,422
Total securities available-for-sale	$	436,868	$	2,886	$	(4,470)	$	435,284

Investments Classified by Contractual Maturity Date [Table Text Block]

The following table presents information for investments in securities available-for-sale at December 31, 2018, 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, 2018
	Amortized Cost		Fair Value
	(dollars in thousands)
Investment Securities Available-for-Sale:
Due in one year or less	$	2,355	$	2,358
Due after one year through five years		36,338		35,953
Due after five years through ten years		28,067		28,375
Due after ten years		156,557		153,280
Residential mortgage pass-through securities		189,721		185,204
Commercial mortgage pass-through securities		3,919		3,874
Other securities		2,990		2,990
Total securities available-for-sale	$	419,947	$	412,034

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, 2018, 2017 and 2016 were as follows:

	Years Ended December 31,
	2018		2017		2016
	(dollars in thousands)
Proceeds	$	-	$	29,543	$	85,253
Gross gains on sales of investment securities	$	-	$	1,596	$	4,234
Gross losses on sales of investment securities		-		-		-
Net gains on sales of investment securities		-		1,596		4,234
Tax provision on net gains		-		(579)		(1,682)
Net gains on sales of investment securities, after tax	$	-	$	1,017	$	2,552

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, 2018 and 2017. There were no investments held-to-maturity as of December 31, 2018 and 2017.

	December 31, 2018
	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	$	35,472	$	(605)	$	810	$	(1)	$	34,662	$	(604)
Residential mortgage pass-through securities		178,365		(4,602)		42,040		(393)		136,325		(4,209)
Commercial mortgage pass-through securities		3,874		(45)		-		-		3,874		(45)
Obligations of U.S. states and political subdivisions		64,367		(3,402)		7,765		(21)		56,602		(3,381)
Corporate bonds and notes		15,534		(540)		7,767		(133)		7,767		(407)
Asset-backed securities		3,957		(16)		2,219		(11)		1,738		(5)
Total Temporarily Impaired Securities	$	301,569	$	(9,210)	$	60,601	$	(559)	$	240,968	$	(8,651)
	December 31, 2017
	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	$	39,813	$	(416)	$	28,407	$	(213)	$	11,406	$	(203)
Residential mortgage pass-through securities		148,574		(1,948)		117,556		(1,146)		31,018		(802)
Commercial mortgage pass-through securities		1,198		(3)		1,198		(3)		-		-
Obligations of U.S. states and political subdivisions		57,685		(1,334)		17,909		(246)		39,776		(1,088)
Trust preferred securities		1,469		(111)		-		-		1,469		(111)
Corporate bonds and notes		11,074		(271)		1,965		(21)		9,109		(250)
Asset-backed securities		7,428		(37)		993		(2)		6,435		(35)
Equity securities		11,116		(350)		-		-		11,116		(350)
Total Temporarily Impaired Securities	$	278,357	$	(4,470)	$	168,028	$	(1,631)	$	110,329	$	(2,839)