Securities Available-for-Sale (Tables)

3 Months Ended

Mar. 31, 2018

Investments, Debt and Equity Securities [Abstract]

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

The following table summarizes the amortized cost and fair value of securities available-for-sale at March 31, 2018 and December 31, 2017 and the corresponding amounts of gross unrealized gains and losses recognized in accumulated other comprehensive income (loss).

			Gross		Gross
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
March 31, 2018	(dollars in thousands)
Investment securities available-for-sale
Federal agency obligations	$	53,318	$	29	$	(876	)	$	52,471
Residential mortgage pass-through securities		192,537		180		(3,960	)		188,757
Commercial mortgage pass-through securities		4,020		-		(61	)		3,959
Obligations of U.S. states and political subdivisions		128,941		1,167		(2,738	)		127,370
Trust preferred securities		4,577		120		(83	)		4,614
Corporate bonds and notes		29,302		93		(392	)		29,003
Asset-backed securities		11,463		53		(22	)		11,494
Certificates of deposit		621		2		-			623
Other securities		6,031		-		-			6,031
Total securities available-for-sale	$	430,810	$	1,644	$	(8,132	)	$	424,322
			Gross		Gross
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gains		Losses			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 March 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.

	March 31, 2018
	Amortized		Fair
	Cost		Value
	(dollars in thousands)
Investment Securities Available-for-Sale:
Due in one year or less	$	9,526	$	9,518
Due after one year through five years		28,768		28,857
Due after five years through ten years		36,318		36,369
Due after ten years		153,610		150,831
Residential mortgage pass-through securities		192,537		188,757
Commercial mortgage pass-through securities		4,020		3,959
Other securities		6,031		6,031
Total securities available-for-sale	$	430,810	$	424,322

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

Gross gains and losses from the sales of securities available-for-sale for the three months ended March 31, 2018 and 2017 were as follows:

	Three Months Ended
	March 31,
	2018		2017
	(dollars in thousands)
Proceeds	$	-	$	29,543
Gross gains on sales of securities	$	-	$	1,596
Gross losses on sales of securities		-		-
Net gains on sales of securities		-		1,596
Less: tax provision on net gains		-		(579	)
Net gains on sales of securities, after tax	$	-	$	1,017

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 March 31, 2018 and December 31, 2017:

	March 31, 2018
	Total					Less than 12 Months					12 Months or Longer
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Losses			Value		Losses			Value		Losses
	(dollars in thousands)
Investment Securities
Available-for-Sale:
Federal agency obligation	$	47,303	$	(876	)	$	35,987	$	(538	)	$	11,316	$	(338	)
Residential mortgage pass-through securities		179,661		(3,960	)		142,446		(2,428	)		37,215		(1,532	)
Commercial mortgage pass-through securities		3,959		(61	)		3,959		(61	)		-		-
Obligations of U.S. states and political subdivisions		68,741		(2,738	)		31,497		(630	)		37,244		(2,108	)
Trust preferred securities		1,496		(83	)		-		-			1,496		(83	)
Corporate bonds and notes		19,693		(392	)		10,637		(87	)		9,056		(305	)
Asset-backed securities		2,907		(22	)		923		(11	)		1,984		(11	)
Total Temporarily Impaired Securities	$	323,760	$	(8,132	)	$	225,449	$	(3,755	)	$	98,311	$	(4,377	)
	December 31, 2017
	Total					Less than 12 Months					12 Months or Longer
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Losses			Value		Losses			Value		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	)