Investment Securities Maturity of Held-to-Maturity Securities (Tables)

6 Months Ended

Jun. 30, 2019

Schedule of Held-to-maturity Securities [Line Items]

Debt Securities, Held-to-maturity [Table Text Block]

Below is an analysis of the amortized cost and fair values of debt securities held to maturity at:

	June 30, 2019									December 31, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(dollars in thousands)
Obligations of U.S. Government Agencies:
Mortgage-Backed Securities – Residential	$	3,578	$	37	$	—		$	3,615	$	3,635	$	—	$	(97	)	$	3,538
Mortgage-Backed Securities- Commercial	54,618		—		(523		)	54,095		55,221		—		(2,327		)	52,894
Obligations of U.S. Government-Sponsored Enterprises:
Mortgage-Backed Securities – Residential	259,748		684		(1,012		)	259,420		279,109		212		(7,254		)	272,067
Mortgage-Backed Securities – Commercial	12,633		108		—			12,741		13,159		—		(258		)	12,901
Obligations of States and Political Subdivisions	42,276		589		(1		)	42,864		42,331		175		(313		)	42,193
Debt Securities Issued by Foreign Governments	600		—		—			600		400		—		—			400
Total Securities Held to Maturity	$	373,453	$	1,418	$	(1,536	)	$	373,335	$	393,855	$	387	$	(10,249	)	$	383,993

Schedule of Held-to-Maturity Securities by Maturity [Table Text Block]

The amortized cost and estimated fair value of debt securities held to maturity at June 30, 2019, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or repay obligations with or without call or prepayment penalties.

	Amortized Cost		Estimated Fair Value
	(dollars in thousands)
Due within 1 year	$	515	$	515
Due after 1 but within 5 years	8,103		8,170
Due after 5 but within 10 years	34,258		34,779
Due after 10 years	—		—
	42,876		43,464
Mortgage-Backed Securities (a)	330,577		329,871
Total Debt Securities	$	373,453	$	373,335

(a)

Mortgage-backed and collateralized mortgage securities, which have prepayment provisions, are not assigned to maturity categories due to fluctuations in their prepayment speeds. Mortgage-Backed Securities include an amortized cost of $58.2 million and a fair value of $57.7 million for Obligations of U.S. Government agencies issued by Ginnie Mae and an amortized cost of $272.4 million and a fair value of $272.2 million for Obligations of U.S. Government-sponsored enterprises issued by Fannie Mae and Freddie Mac.