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

9 Months Ended

Sep. 30, 2016

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

Held-to-maturity Securities [Table Text Block]

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

	September 30, 2016									December 31, 2015
	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	$	4,615	$	154	$	—		$	4,769	$	4,775	$	—	$	(7	)	$	4,768
Mortgage-Backed Securities- Commercial	35,625		225		—			35,850		16,843		—		(247		)	16,596
Obligations of U.S. Government-Sponsored Enterprises:
Mortgage-Backed Securities – Residential	297,681		5,865		—			303,546		315,609		30		(1,824		)	313,815
Mortgage-Backed Securities – Commercial	14,809		378		—			15,187		15,187		—		(178		)	15,009
Obligations of States and Political Subdivisions	36,783		884		(25		)	37,642		31,910		301		(58		)	32,153
Total Securities Held to Maturity	$	389,513	$	7,506	$	(25	)	$	396,994	$	384,324	$	331	$	(2,314	)	$	382,341

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 September 30, 2016, 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	$	—	$	—
Due after 1 but within 5 years	1,223		1,249
Due after 5 but within 10 years	29,368		30,125
Due after 10 years	6,192		6,268
	36,783		37,642
Mortgage-Backed Securities (a)	352,730		359,352
Total Debt Securities	$	389,513	$	396,994

(a) Mortgage Backed Securities include an amortized cost of $40.2 million and a fair value of $40.6 million for Obligations of U.S. Government agencies issued by Ginnie Mae and an amortized cost of $312.5 million and a fair value of $318.7 million for Obligations of U.S. Government-sponsored enterprises issued by Fannie Mae and Freddie Mac.