Investment Securities (Tables)

12 Months Ended

Dec. 31, 2015

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, 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

(dollars in thousands)	December 31, 2014
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
U.S. government sponsored enterprises	$	78,420		2		622		77,800
State and political subdivisions		2,232		39		-		2,271
Mortgage backed securities and collateralized mortgage obligations - residential		486,107		1,108		3,655		483,560
Corporate bonds		1,500		-		-		1,500
Small Business Administration- guaranteed participation securities		103,273		-		2,777		100,496
Mortgage backed securities and collateralized mortgage obligations - commercial		10,696		-		249		10,447
Other		650		-		-		650
Total debt securities		682,878		1,149		7,303		676,724
Equity securities		35		-		-		35
Total securities available for sale	$	682,913		1,149		7,303		676,759

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 2015, 2014 and 2013 are as follows:

(dollars in thousands)	Year ended December 31,
	2015		2014		2013
Proceeds from sales	$	22,945		69,147		160,820
Proceeds from calls		232,010		251,927		256,384
Gross realized gains		251		720		1,702
Gross realized losses		-		3		80

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, 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

(dollars in thousands)	December 31, 2014
	Amortized Cost		Gross Unrecognized Gains		Gross Unrecognized Losses		Fair Value
Mortgage backed securities and collateralized mortgage obligations - residential	$	60,986		3,334		-		64,320
Corporate bonds		9,960		1,062		-		11,022
Total held to maturity	$	70,946		4,396		-		75,342

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, 2015 that represent greater than 10% of shareholders’ equity:

(dollars in thousands)	Amortized Cost		Fair  Value
Federal Home Loan Mortgage Corporation	$	161,834		160,976
Federal National Mortgage Association		335,008		331,414
Government National Mortgage Association		61,696		63,157
Small Business Administration		92,620		90,417

Securities Available for Sale [Member]

Investment [Line Items]

Debt securities based on the securities final 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, 2015, 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	$	1,456		1,454
Due in one year through five years		86,482		86,322
Due after five years through ten years		872		892
Due after ten years		9		9
Mortgage backed securities and collateralized mortgage obligations - residential		416,625		411,729
Small Business Administration- guaranteed participation securities		92,620		90,416
Mortgage backed securities and collateralized mortgage obligations - commercial		10,422		10,180
	$	608,486		601,002

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, 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

(dollars in thousands)	December 31, 2014
	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	$	12,840		81		54,959		541		67,799		622
Mortgage backed securities and collateralized mortgage obligations - residential		65,549		492		325,476		3,163		391,025		3,655
Small Business Administration- guaranteed participation securities		-		-		100,496		2,777		100,496		2,777
Mortgage backed securities and collateralized mortgage obligations - commercial		-		-		10,447		249		10,447		249
Total	$	78,389		573		491,378		6,730		569,767		7,303

Held to Maturity Securities [Member]

Investment [Line Items]

Debt securities based on the securities final maturity

The following table distributes the debt securities included in the held to maturity portfolio as of December 31, 2015, 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 through five years	$	9,975		10,641
Mortgage backed securities and collateralized mortgage obligations - residential		46,490		48,798
	$	56,465		59,439