Investment Securities (Tables)

12 Months Ended

Dec. 31, 2016

Investment Securities [Abstract]

Amortized cost and fair value of the securities available for sale

The amortized cost and fair value of the securities available for sale are as follows:

(dollars in thousands)	December 31, 2016
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
U.S. government sponsored enterprises	$	119,887		-		2,621		117,266
State and political subdivisions		873		13		-		886
Mortgage backed securities and collateralized mortgage obligations - residential		378,068		123		5,883		372,308
Corporate bonds		40,956		-		251		40,705
Small Business Administration-guaranteed participation securities		81,026		-		2,527		78,499
Mortgage backed securities and collateralized mortgage obligations - commercial		10,130		-		119		10,011
Other		650		-		-		650
Total debt securities		631,590		136		11,401		620,325
Equity securities		35		-		-		35
Total securities available for sale	$	631,625		136		11,401		620,360

(dollars in thousands)	December 31, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
U.S. government sponsored enterprises	$	86,899		19		181		86,737
State and political subdivisions		1,270		20		-		1,290
Mortgage backed securities and collateralized mortgage obligations - residential		416,625		430		5,326		411,729
Small Business Administration-guaranteed participation securities		92,620		-		2,204		90,416
Mortgage backed securities and collateralized mortgage obligations - commercial		10,422		-		242		10,180
Other		650		-		-		650
Total debt securities		608,486		469		7,953		601,002
Equity securities		35		-		-		35
Total securities available for sale	$	608,521		469		7,953		601,037

Investment [Line Items]

Proceeds from sales and calls of securities available for sale, gross realized gains and gross realized losses

The proceeds from sales and calls of securities available for sale, gross realized gains and gross realized losses from sales and calls during 2016, 2015 and 2014 are as follows:

(dollars in thousands)	Year ended December 31,
	2016		2015		2014
Proceeds from sales	$	44,829		22,945		69,147
Proceeds from calls		201,100		232,010		251,927
Gross realized gains		668		251		720
Gross realized losses		-		-		3

Amortized cost and fair value of the held to maturity securities

The amortized cost and fair value of the held to maturity securities are as follows:

(dollars in thousands)	December 31, 2016
	Amortized Cost		Gross Unrecognized Gains		Gross Unrecognized Losses		Fair Value
Mortgage backed securities and collateralized mortgage obligations - residential	$	35,500		1,736		-		37,236
Corporate bonds		9,990		300		-		10,290
Total held to maturity	$	45,490		2,036		-		47,526

(dollars in thousands)	December 31, 2015
	Amortized Cost		Gross Unrecognized Gains		Gross Unrecognized Losses		Fair Value
Mortgage backed securities and collateralized mortgage obligations - residential	$	46,490		2,308		-		48,798
Corporate bonds		9,975		666		-		10,641
Total held to maturity	$	56,465		2,974		-		59,439

Securities held in available for sale and held to maturity greater than 10% of shareholders equity

The Company has the following balances of securities held in the available for sale and held to maturity portfolios as of December 31, 2016 that represent greater than 10% of shareholders’ equity:

(dollars in thousands)	Amortized Cost		Fair Value
Federal Home Loan Mortgage Corporation	$	121,584		119,577
Federal National Mortgage Association		306,452		302,052
Government National Mortgage Association		44,842		46,012
Small Business Administration		81,026		78,499

Securities Available for Sale [Member]

Investment [Line Items]

Debt securities based on the securities contractual maturity

The following table distributes the amortized cost and fair value of debt securities included in the available for sale portfolio as of December 31, 2016, based on the securities’ final maturity.  Actual maturities may differ because of securities prepayments and the right of certain issuers to call or prepay their obligations without penalty.  Securities not due at a single maturity are shown separately:

(dollars in thousands)	Amortized Cost		Fair Value
Due in one year or less	$	5,008		4,998
Due in one year through five years		142,292		139,946
Due after five years through ten years		15,066		14,563
Due after ten years		-		-
Mortgage backed securities and
collateralized mortgage
obligations - residential		378,068		372,308
Small Business Administration- guaranteed participation securities		81,026		78,499
Mortgage backed securities and collateralized mortgage obligations - commercial		10,130		10,011
	$	631,590		620,325

Gross unrealized losses on investment securities and the related fair values aggregated by the length of time that individual securities have been in an unrealized loss position

Gross unrealized losses on securities available for sale and the related fair values aggregated by the length of time that individual securities have been in an unrealized loss position, were as follows:

(dollars in thousands)	December 31, 2016
	Less than 12 months				12 months or more				Total
	Fair Value		Gross Unreal. Loss		Fair Value		Gross Unreal. Loss		Fair Value		Gross Unreal. Loss
U.S. government sponsored enterprises	$	102,266		2,621		-		-		102,266		2,621
Mortgage backed securities and collateralized mortgage obligations - residential		359,622		5,766		4,713		117		364,335		5,883
Corporate bonds		40,705		251		-		-		40,705		251
Small Business Administration- guaranteed participation securities		64,560		1,960		13,940		567		78,500		2,527
Mortgage backed securities and collateralized mortgage obligations - commercial		10,011		119		-		-		10,011		119
Total	$	577,164		10,717		18,653		684		595,817		11,401

(dollars in thousands)	December 31, 2015
	Less than 12 months				12 months or more				Total
	Fair Value		Gross Unreal. Loss		Fair Value		Gross Unreal. Loss		Fair Value		Gross Unreal. Loss
U.S. government sponsored enterprises	$	41,786		113		9,932		68		51,718		181
Mortgage backed securities and collateralized mortgage obligations - residential		187,605		2,147		167,549		3,179		355,153		5,326
Small Business Administration- guaranteed participation securities		7,529		111		82,888		2,093		90,417		2,204
Mortgage backed securities and collateralized mortgage obligations - commercial		5,553		130		4,627		112		10,180		242
Total	$	242,473		2,501		264,996		5,452		507,468		7,953

Held to Maturity Securities [Member]

Investment [Line Items]

Debt securities based on the securities contractual maturity

The following table distributes the debt securities included in the held to maturity portfolio as of December 31, 2016, based on the securities’ final maturity. Actual maturities may differ because of securities prepayments and the right of certain issuers to call or prepay their obligations without penalty.  Securities not due at a single maturity date are shown separately.

(dollars in thousands)	Amortized Cost		Fair Value
Due in one year or less	$	9,990		10,290
Mortgage backed securities and collateralized mortgage obligations - residential		35,500		37,236
	$	45,490		47,526