Securities (Tables)

6 Months Ended

Jun. 30, 2013

Securities [Abstract]

Fair value of securities

			Gross		Gross
	Amortized		Unrealized		Unrealized			Fair
June 30, 2013	Cost		Gains		Losses			Value
Available for sale
U.S. Treasury and federal agencies	$	39,071	$	150	$	(614	)	$	38,607
State and municipal		176,838		5,949		(2,420	)		180,367
Federal agency collateralized mortgage obligations		108,607		1,366		(1,170	)		108,803
Federal agency mortgage-backed pools		151,146		3,583		(1,652	)		153,077
Private labeled mortgage-backed pools		1,502		52		—			1,554
Corporate notes		32		13		—			45
Total available for sale investment securities	$	477,196	$	11,113	$	(5,856	)	$	482,453
Held to maturity, State and Municipal	$	9,910	$	—	$	—		$	9,910
			Gross		Gross
	Amortized		Unrealized		Unrealized			Fair
December 31, 2012	Cost		Gains		Losses			Value
Available for sale
U.S. Treasury and federal agencies	$	51,458	$	351	$	(30	)	$	51,779
State and municipal		162,147		10,842		(84	)		172,905
Federal agency collateralized mortgage obligations		95,337		1,533		(39	)		96,831
Federal agency mortgage-backed pools		152,372		6,847		(15	)		159,204
Private labeled mortgage-backed pools		1,960		71		—			2,031
Corporate notes		32		19		—			51
Total available for sale investment securities	$	463,306	$	19,663	$	(168	)	$	482,801

Amortized cost and fair value of securities available for sale and held to maturity

	June 30, 2013				December 31, 2012
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Available for sale
Within one year	$	4,163	$	4,184	$	4,358	$	4,368
One to five years		43,560		44,113		49,415		50,673
Five to ten years		98,188		100,398		98,551		104,258
After ten years		70,030		70,324		61,313		65,436
		215,941		219,019		213,637		224,735
Federal agency collateralized mortgage obligations		108,607		108,803		95,337		96,831
Federal agency mortgage-backed pools		151,146		153,077		152,372		159,204
Private labeled mortgage-backed pools		1,502		1,554		1,960		2,031
Total available for sale investment securities	$	477,196	$	482,453	$	463,306	$	482,801
Held to maturity
Within one year	$	9,910	$	9,910	$	—	$	—
One to five years		—		—		—		—
Total held to maturity investment securities	$	9,910	$	9,910	$	—	$	—

Gross unrealized losses and the fair value of the Company's investments

	Less than 12 Months					12 Months or More					Total
June 30, 2013	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
U.S. Treasury and federal agencies	$	27,871	$	(614	)	$	—	$	—		$	27,871	$	(614	)
State and municipal		55,862		(2,403	)		1,141		(17	)		57,003		(2,420	)
Federal agency collateralized mortgage obligations		51,644		(1,170	)		—		—			51,644		(1,170	)
Federal agency mortgage-backed pools		48,313		(1,652	)		—		—			48,313		(1,652	)
Total temporarily impaired securities	$	183,690	$	(5,839	)	$	1,141	$	(17	)	$	184,831	$	(5,856	)
	Less than 12 Months					12 Months or More					Total
December 31, 2012	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
U.S. Treasury and federal agencies	$	13,064	$	(30	)	$	—	$	—		$	13,064	$	(30	)
State and municipal		11,928		(84	)		—		—			11,928		(84	)
Federal agency collateralized mortgage obligations		12,719		(39	)		—		—			12,719		(39	)
Federal agency mortgage-backed pools		4,126		(15	)		—		—			4,126		(15	)
Total temporarily impaired securities	$	41,837	$	(168	)	$	—	$	—		$	41,837	$	(168	)

Sales of securities available for sale

	Three months ended June 30				Six months ended June 30
	2013		2012		2013			2012
Sales of securities available for sale (Unaudited)
Proceeds	$	—	$	—	$	23,485		$	—
Gross gains		—		—		376			—
Gross losses		—		—		(8	)		—