Securities (Tables)

3 Months Ended

Mar. 31, 2013

Securities [Abstract]

Amortized cost of securities and their estimated fair values

	March 31, 2013
			Gross		Gross			Estimated
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
	(Dollars in Thousands)
Restricted:
FHLB stock	$	4,428		—		—			4,428
Unrestricted:
U.S. government and agency securities:
Agency debt securities	$	139,563		5,136		(66	)		144,633
Taxable municipal bonds		17,117		1,149		(45	)		18,221
Tax free municipal bonds		66,943		4,491		(126	)		71,308
Trust preferred securities		2,000		—		(511	)		1,489
Mortgage-backed securities:
GNMA		17,657		1,133		(7	)		18,783
FNMA		67,678		2,177		(153	)		69,702
FHLMC		3,972		131		—			4,103
NON-AGENCY CMOs		10,334		41		(140	)		10,235
AGENCY CMOs		14,238		334		(73	)		14,499
	$	339,502		14,592		(1,121	)		352,973

	December 31, 2012
			Gross		Gross			Estimated
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
	(Dollars in Thousands)
Restricted:
FHLB stock	$	4,428		—		—			4,428
Unrestricted:
U.S. government and agency securities:
Agency debt securities	$	147,659		5,202		(83	)		152,778
Taxable municipal bonds		12,535		1,209		(8	)		13,736
Tax free municipal bonds		68,331		5,756		(40	)		74,047
Trust preferred securities		2,000		—		(511	)		1,489
Mortgage-backed securities:
GNMA		19,172		1,244		(19	)		20,397
FNMA		64,805		2,558		(58	)		67,305
FHLMC		4,519		153		—			4,672
SLMA CMO		5,412		80		—			5,492
AGENCY CMOs		16,055		426		(52	)		16,429
	$	340,488		16,628		(771	)		356,345

Maturities of debt securities available for sale

			Estimated
	Amortized		Fair
	Cost		Value
Due within one year	$	420	$	420
Due in one to five years		13,205		13,378
Due in five to ten years		31,888		33,668
Due after ten years		52,924		56,106
		98,437		103,572
Amortizing agency bonds		127,186		132,079
Mortgage-backed securities		113,879		117,322
Total unrestricted securities available for sale	$	339,502	$	352,973

			Estimated
	Amortized		Fair
	Cost		Value
Due within one year	$	345	$	346
Due in one to five years		11,499		11,682
Due in five to ten years		30,007		32,316
Due in more than ten years		53,222		57,290
		95,073		101,634
Amortizing agency bonds		135,452		140,416
Mortgage-backed securities		109,963		114,295
Total unrestricted securities available for sale	$	340,488	$	356,345

Estimated fair value and unrealized loss amounts of temporarily impaired investments

	Less than 12 months					12 months or longer					Total
	Estimated		Unrealized			Estimated		Unrealized			Estimated		Unrealized
	Fair Value		Losses			Fair Value		Losses			Fair Value		Losses
	(Dollars in Thousands)
Available for sale
U.S. government and agency securities:
Agency debt securities	$	14,234		(66	)		—		—			14,234		(66	)
Taxable municipals		4,441		(45	)		—		—			4,441		(45	)
Tax free municipals		8,510		(126	)		—		—			8,510		(126	)
Trust preferred securities		—		—			1,489		(511	)		1,489		(511	)
Mortgage-backed securities:
GNMA		—		—			1,220		(7	)		1,220		(7	)
FNMA		9,989		(153	)		—		—			9,989		(153	)
FHLMC		—		—			—		—			—		—
NON-AGENCY CMOs		1,553		(140	)		—		—			1,553		(140	)
AGENCY CMOs		1,978		(67	)		1,232		(6	)		3,210		(73	)
Total Available for Sale	$	40,705		(597	)		3,941		(524	)		44,646		(1,121	)

	Less than 12 months					12 months or longer					Total
	Estimated		Unrealized			Estimated		Unrealized			Estimated		Unrealized
	Fair Value		Losses			Fair Value		Losses			Fair Value		Losses
	(Dollars in Thousands)
Available for sale
U.S. government and agency securities:
Agency debt securities	$	12,317		(83	)		—		—			12,317		(83	)
Taxable municipal bonds		885		(8	)		—		—			885		(8	)
Tax free municipal bonds		5,315		(40	)		—		—			5,315		(40	)
Trust preferred securities		—		—			1,489		(511	)		1,489		(511	)
Mortgage-backed securities:
GNMA		—		—			1,415		(19	)		1,415		(19	)
FNMA		7,077		(58	)		—		—			7,077		(58	)
FHLMC		—		—			—		—			—		—
NON-AGENCY CMOs		—		—			—		—			—		—
AGENCY CMOs		3,691		(52	)		—		—			3,691		(52	)
Total Available for Sale	$	29,285		(241	)		2,904		(530	)		32,189		(771	)