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

6 Months Ended

Jun. 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:

	June 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	$	4,712	$	146	$	—	$	4,858	$	4,775	$	—	$	(7	)	$	4,768
Mortgage-Backed Securities- Commercial	36,529		403		—		36,932		16,843		—		(247		)	16,596
Obligations of U.S. Government-Sponsored Enterprises:
Mortgage-Backed Securities – Residential	313,987		6,746		—		320,733		315,609		30		(1,824		)	313,815
Mortgage-Backed Securities – Commercial	14,940		460		—		15,400		15,187		—		(178		)	15,009
Obligations of States and Political Subdivisions	35,808		1,039		—		36,847		31,910		301		(58		)	32,153
Total Securities Held to Maturity	$	405,976	$	8,794	$	—	$	414,770	$	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 June 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	1,231		1,265
Due after 5 but within 10 years	28,052		28,940
Due after 10 years	6,525		6,642
	35,808		36,847
Mortgage-Backed Securities (a)	370,168		377,923
Total Debt Securities	$	405,976	$	414,770

(a) Mortgage Backed Securities include an amortized cost of $41.2 million and a fair value of $41.8 million for Obligations of U.S. Government agencies issued by Ginnie Mae and an amortized cost of $328.9 million and a fair value of $336.1 million for Obligations of U.S. Government-sponsored enterprises issued by Fannie Mae and Freddie Mac.