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

6 Months Ended

Jun. 30, 2020

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, 2020								December 31, 2019
	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	$	3,008	$	191	$	—	$	3,199	$	3,392	$	57	$	—	$	3,449
Mortgage-Backed Securities- Commercial	46,803		1,646		—		48,449		51,291		18		(184)		51,125
Obligations of U.S. Government-Sponsored Enterprises:
Mortgage-Backed Securities – Residential	197,342		6,974		—		204,316		229,667		1,377		(294)		230,750
Mortgage-Backed Securities – Commercial	10,894		395		—		11,289		12,081		67		—		12,148
Obligations of States and Political Subdivisions	39,139		682		—		39,821		40,092		554		—		40,646
Debt Securities Issued by Foreign Governments	800		—		—		800		600		—		—		600
Total Securities Held to Maturity	$	297,986	$	9,888	$	—	$	307,874	$	337,123	$	2,073	$	(478)	$	338,718

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, 2020, 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	$	1,012	$	1,018
Due after 1 but within 5 years	14,227		14,404
Due after 5 but within 10 years	24,700		25,199
Due after 10 years	—		—
	39,939		40,621
Mortgage-Backed Securities (a)	258,047		267,253
Total Debt Securities	$	297,986	$	307,874

(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 $49.8 million and a fair value of $51.6 million for Obligations of U.S. Government agencies issued by Ginnie Mae and an amortized cost of $208.2 million and a fair value of $215.6 million for Obligations of U.S. Government-sponsored enterprises issued by Fannie Mae and Freddie Mac.