Investment Securities (Tables)

6 Months Ended

Jun. 30, 2016

Investments, Debt and Equity Securities [Abstract]

Schedule of amortized cost and fair value of the available-for-sale investment securities portfolio

	June 30, 2016
			Gross		Gross
	Amortized		unrealized		unrealized			Estimated
	cost		gains		losses			fair value
Available-for-sale	(Dollars in thousands)
Obligations of U.S. Government agencies	$	102,797		452		(207	)		103,042
Obligations of states and political subdivisions		127,699		6,366		(17	)		134,048
Mortgage backed securities
U.S. GSE’s* MBS - residential		127,509		2,521		(21	)		130,009
U.S. GSE’s* MBS - commercial		28,855		527		—			29,382
U.S. GSE’s CMO		177,314		3,353		(107	)		180,560
Corporate bonds		118,463		1,771		(1,018	)		119,216
	$	682,637		14,990		(1,370	)		696,257

* Government sponsored entities

	December 31, 2015
			Gross		Gross
	Amortized		unrealized		unrealized			Estimated
	cost		gains		losses			fair value
Available-for-sale	(Dollars in thousands)
Obligations of U.S. Government agencies	$	147,135		274		(1,433	)		145,976
Obligations of states and political subdivisions		136,499		3,827		(266	)		140,060
Mortgage backed securities
U.S. GSE’s MBS - residential		121,646		752		(890	)		121,508
U.S. GSE’s MBS - commercial		21,805		125		(261	)		21,669
U.S. GSE’s CMO		146,782		437		(1,642	)		145,577
Corporate bonds		117,666		524		(1,417	)		116,773
	$	691,533		5,939		(5,909	)		691,563

Schedule of proceeds from sales of securities available-for-sale and the associated gains (losses), excluding gains (losses) on called securities

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2016			2015			2016			2015
	(Dollars in thousands)						(Dollars in thousands)
Proceeds from Sales	$	19,390		$	53,848		$	70,394		$	77,148
Gross Gains		197			111			660			219
Gross Losses		(71	)		(1,008	)		(298	)		(1,059	)

Schedule of amortized cost and fair value of the investment securities portfolio excluding equity securities by expected maturity

	June 30, 2016
	Amortized		Estimated
	cost		fair value
	(Dollars in thousands)
Available-for-sale:
One year or less	$	8,336		8,354
After one year through five years		107,874		110,292
After five years through ten years		167,396		169,475
After ten years		399,031		408,136
	$	682,637		696,257

Schedule of investment securities with unrealized losses

	June 30, 2016
	Less than 12 months				12 months or longer				Total
	Estimated		Unrealized		Estimated		Unrealized		Estimated		Unrealized
	fair value		loss		fair value		loss		fair value		loss
Temporarily impaired	(Dollars in thousands)
Obligations of U.S. Government agencies	$	7,849		55		27,001		152		34,850		207
Obligations of states and political subdivisions		—		—		1,290		17		1,290		17
Mortgage backed securities
U.S. GSE’s MBS - residential		—		—		5,293		21		5,293		21
U.S. GSE’s MBS - commercial		—		—		—		—		—		—
U.S. GSE’s CMO		7,039		47		4,334		60		11,373		107
Corporate bonds		5,939		61		19,995		957		25,934		1,018
	$	20,827		163		57,913		1,207		78,740		1,370

	December 31, 2015
	Less than 12 months				12 months or longer				Total
	Estimated		Unrealized		Estimated		Unrealized		Estimated		Unrealized
	fair value		loss		fair value		loss		fair value		loss
Temporarily impaired	(Dollars in thousands)
Obligations of U.S. Government agencies	$	57,409		388		63,971		1,045		121,380		1,433
Obligations of states and political subdivisions		21,421		235		2,794		31		24,215		266
Mortgage backed securities
U.S. GSE’s MBS - residential		71,185		607		11,105		283		82,290		890
U.S. GSE’s MBS - commercial		9,428		261		—		—		9,428		261
U.S. GSE’s CMO		102,082		1,463		6,584		179		108,666		1,642
Corporate bonds		69,459		705		17,683		712		87,142		1,417
	$	330,984		3,659		102,137		2,250		433,121		5,909