Securities (Tables)

12 Months Ended

Dec. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Fair Value of Securities

The fair value of securities is as follows:

December 31, 2015	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available for sale
U.S. Treasury and federal agencies	$	5,940	$	3	$	(17	)	$	5,926
State and municipal		73,829		1,299		(33	)		75,095
Federal agency collateralized mortgage obligations		157,291		567		(1,655	)		156,203
Federal agency mortgage-backed pools		206,970		2,080		(1,346	)		207,704
Corporate notes		32		22		—			54
Total available for sale investment securities	$	444,062	$	3,971	$	(3,051	)	$	444,982
Held to maturity
U.S. Treasury and federal agencies	$	5,859	$	93	$	—		$	5,952
State and municipal		146,331		5,375		(253	)		151,453
Federal agency collateralized mortgage obligations		9,051		27		(124	)		8,954
Federal agency mortgage-backed pools		26,388		1,141		(185	)		27,344
Total held to maturity investment securities	$	187,629	$	6,636	$	(562	)	$	193,703

December 31, 2014	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available for sale
U.S. Treasury and federal agencies	$	26,996	$	56	$	(229	)	$	26,823
State and municipal		46,535		1,462		(45	)		47,952
Federal agency collateralized mortgage obligations		122,930		975		(1,045	)		122,860
Federal agency mortgage-backed pools		122,583		3,172		(360	)		125,395
Private labeled mortgage-backed pools		670		19		—			689
Corporate notes		32		13		—			45
Total available for sale investment securities	$	319,746	$	5,697	$	(1,679	)	$	323,764
Held to maturity
U.S. Treasury and federal agencies	$	9,804	$	82	$	—		$	9,886
State and municipal		129,595		3,398		(106	)		132,887
Federal agency collateralized mortgage obligations		4,039		35		(1	)		4,073
Federal agency mortgage-backed pools		22,329		729		—			23,058
Total held to maturity investment securities	$	165,767	$	4,244	$	(107	)	$	169,904

Amortized Cost and Fair Value of Securities Available for Sale and Held to Maturity

The amortized cost and fair value of securities available for sale and held-to-maturity at December 31, 2015 and December 31, 2014, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties.

	December 31, 2015				December 31, 2014
	Amortized		Fair		Amortized		Fair
	Cost		Value		Cost		Value
Available for sale
Within one year	$	7,192	$	7,232	$	6,098	$	6,169
One to five years		38,197		38,894		44,720		45,093
Five to ten years		16,807		17,152		16,147		16,768
After ten years		17,605		17,797		6,598		6,790
		79,801		81,075		73,563		74,820
Federal agency collateralized mortgage obligations		157,291		156,203		122,930		122,860
Federal agency mortgage-backed pools		206,970		207,704		122,583		125,395
Private labeled mortgage-backed pools		—		—		670		689
Total available for sale investment securities	$	444,062	$	444,982	$	319,746	$	323,764
Held to maturity
Within one year	$	—	$	—	$	—	$	—
One to five years		17,815		18,403		592		593
Five to ten years		106,167		110,026		99,225		101,323
After ten years		28,208		28,976		39,582		40,857
		152,190		157,404		139,399		142,773
Federal agency collateralized mortgage obligations		9,051		8,954		4,039		4,073
Federal agency mortgage-backed pools		26,388		27,344		22,329		23,058
Total held to maturity investment securities	$	187,629	$	193,703	$	165,767	$	169,904

Gross Unrealized Losses and Fair Value of Company's Investments

The following table shows the gross unrealized losses and the fair value of the Company’s investments, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position.

	Less than 12 Months					12 Months or More					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
December 31, 2015	Value		Losses			Value		Losses			Value		Losses
U.S. Treasury and federal agencies	$	5,468	$	(17	)	$	—	$	—		$	5,468	$	(17	)
State and municipal		17,353		(280	)		446		(6	)		17,799		(286	)
Federal agency collateralized mortgage obligations		89,459		(1,123	)		25,428		(655	)		114,887		(1,779	)
Federal agency mortgage-backed pools		113,244		(1,212	)		16,506		(319	)		129,750		(1,531	)
Total temporarily impaired securities	$	225,524	$	(2,632	)	$	42,380	$	(980	)	$	267,904	$	(3,613	)

	Less than 12 Months					12 Months or More					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
December 31, 2014	Value		Losses			Value		Losses			Value		Losses
U.S. Treasury and federal agencies	$	2,993	$	(7	)	$	20,762	$	(222	)	$	23,755	$	(229	)
State and municipal		10,287		(121	)		2,050		(30	)		12,337		(151	)
Federal agency collateralized mortgage obligations		15,013		(88	)		39,801		(957	)		54,814		(1,045	)
Federal agency mortgage-backed pools		5,993		(9	)		28,044		(351	)		34,037		(360	)
Total temporarily impaired securities	$	34,286	$	(225	)	$	90,657	$	(1,560	)	$	124,943	$	(1,785	)

Sales of Securities Available for Sale

Information regarding security proceeds, gross gains and gross losses are presented below.

	Years ended December 31
	2015			2014		2013
Sales of securities available for sale
Proceeds	$	43,051		$	45,228	$	23,853
Gross gains		254			988		382
Gross losses		(65	)		—		(8	)