INVESTMENT SECURITIES

The portfolio of securities consisted of the following (in thousands):



	December 31, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Available-for-sale:
Obligations of state and political subdivisions	$	23,042	$	209	$	442	$	22,809
GSE mortgage-backed securities	58,620		825		321		59,124
Collateralized mortgage obligations: residential	202,573		90		4,508		198,155
Collateralized mortgage obligations: commercial	2,274		—		34		2,240
Mutual funds	2,100		—		39		2,061
Corporate debt securities	23,975		837		10		24,802
	$	312,584	$	1,961	$	5,354	$	309,191



	December 31, 2016
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Available-for-sale:
Obligations of state and political subdivisions	$	29,935	$	226	$	1,020	$	29,141
GSE mortgage-backed securities	72,144		1,736		302		73,578
Collateralized mortgage obligations: residential	223,602		206		3,606		220,202
Collateralized mortgage obligations: commercial	3,135		—		53		3,082
Mutual funds	2,100		—		41		2,059
Corporate debt securities	13,500		311		—		13,811
	$	344,416	$	2,479	$	5,022	$	341,873



	December 31, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Held-to-maturity:
Obligations of state and political subdivisions	$	35,908	$	265	$	22	$	36,151
GSE mortgage-backed securities	35,751		171		219		35,703
Collateralized mortgage obligations: residential	7,450		—		321		7,129
Collateralized mortgage obligations: commercial	1,943		—		6		1,937
	$	81,052	$	436	$	568	$	80,920



	December 31, 2016
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Held-to-maturity:
Obligations of state and political subdivisions	$	40,515	$	309	$	39	$	40,785
GSE mortgage-backed securities	44,375		426		311		44,490
Collateralized mortgage obligations: residential	8,969		—		323		8,646
Collateralized mortgage obligations: commercial	4,352		—		12		4,340
	$	98,211	$	735	$	685	$	98,261

With the exception of one private-label collateralized mortgage obligations ("CMOs") with a combined balance remaining of $7,000 and $18,000 at December 31, 2017 and 2016, respectively, all of the Company’s CMOs are government-sponsored enterprise securities.

The amortized cost and fair value of debt securities at December 31, 2017 by contractual maturity are shown below (in thousands). Actual maturities may differ from contractual maturities because of rights to call or repay obligations with or without penalties and scheduled and unscheduled principal payments on mortgage-backed securities and collateralized mortgage obligations.



	Amortized Cost		Fair Value
Available-for-sale:
Due in one year or less	$	1,135	$	1,136
Due after one year through five years	8,425		8,595
Due after five years through ten years	42,340		43,299
Due after ten years	258,584		254,100
	$	310,484	$	307,130



	Amortized Cost		Fair Value
Held-to-maturity:
Due in one year or less	$	1,201	$	1,202
Due after one year through five years	5,395		5,385
Due after five years through ten years	41,784		41,968
Due after ten years	32,672		32,365
	$	81,052	$	80,920

Details concerning investment securities with unrealized losses are as follows (in thousands):



	December 31, 2017
	Securities with losses under 12 months				Securities with losses over 12 months				Total
	Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss
Available-for-sale:
Obligations of state and political subdivisions	$	596	$	5	$	12,716	$	437	$	13,312	$	442
GSE mortgage-backed securities	29,725		224		5,858		97		35,583		321
Collateralized mortgage obligations: residential	57,665		548		137,598		3,960		195,263		4,508
Collateralized mortgage obligations: commercial	—		—		2,240		34		2,240		34
Mutual funds	2,061		39		—		—		2,061		39
Corporate debt securities	2,990		10		—		—		2,990		10
	$	93,037	$	826	$	158,412	$	4,528	$	251,449	$	5,354



	December 31, 2016
	Securities with losses under 12 months				Securities with losses over 12 months				Total
	Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss
Available-for-sale:
Obligations of state and political subdivisions	$	13,402	$	1,020	$	—	$	—	$	13,402	$	1,020
GSE mortgage-backed securities	29,119		302		—		—		29,119		302
Collateralized mortgage obligations: residential	187,235		3,099		14,194		507		201,429		3,606
Collateralized mortgage obligations: commercial	961		4		2,121		49		3,082		53
Mutual funds	2,059		41		—		—		2,059		41
	$	232,776	$	4,466	$	16,315	$	556	$	249,091	$	5,022



	December 31, 2017
	Securities with losses under 12 months				Securities with losses over 12 months				Total
	Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss
Held-to-maturity:
Obligations of state and political subdivisions	$	6,340	$	22	$	—	$	—	$	6,340	$	22
GSE mortgage-backed securities	11,201		89		4,961		130		16,162		219
Collateralized mortgage obligations: residential	—		—		7,129		321		7,129		321
Collateralized mortgage obligations: commercial	1,937		6		—		—		1,937		6
	$	19,478	$	117	$	12,090	$	451	$	31,568	$	568



	December 31, 2016
	Securities with losses under 12 months				Securities with losses over 12 months				Total
	Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss
Held-to-maturity:
Obligations of state and political subdivisions	$	8,054	$	39	$	—	$	—	$	8,054	$	39
GSE mortgage-backed securities	19,408		311		—		—		19,408		311
Collateralized mortgage obligations: residential	—		—		8,645		323		8,645		323
Collateralized mortgage obligations: commercial	4,340		12		—		—		4,340		12
	$	31,802	$	362	$	8,645	$	323	$	40,447	$	685

Management evaluates whether unrealized losses on securities represent impairment that is other than temporary on a quarterly basis. For debt securities, the Company considers its intent to sell the securities or if it is more likely than not the Company will be required to sell the securities. If such impairment is identified, based upon the intent to sell or the more likely than not threshold, the carrying amount of the security is reduced to fair value with a charge to earnings. Upon the result of the aforementioned review, management then reviews for potential other than temporary impairment based upon other qualitative factors. In making this evaluation, management considers changes in market rates relative to those available when the security was acquired, changes in market expectations about the timing of cash flows from securities that can be prepaid, performance of the debt security, and changes in the market’s perception of the issuer’s financial health and the security’s credit quality. If determined that a debt security has incurred other than temporary impairment, then the amount of the credit related impairment is determined. For equity securities, management reviews the near term prospects of the issuer, the nature and cause of the unrealized loss, the severity and duration of the impairments and other factors when determining if an unrealized loss is other than temporary. If a credit loss is evident, the amount of the credit loss is charged to earnings and the non-credit related impairment is recognized through other comprehensive income.

As of December 31, 2017, 84 securities had unrealized losses totaling 2.05% of the individual securities’ amortized cost basis and 1.51% of the Company’s total amortized cost basis. 46 of the 84 securities had been in an unrealized loss position for over twelve months at December 31, 2017. These 46 securities had an amortized cost basis and unrealized loss of $175.5 million and $5.0 million, respectively. The unrealized losses on securities at December 31, 2017 and 2016 resulted from changing market interest rates over the yields available at the time the underlying securities were purchased. Management identified no impairment related to credit quality. At December 31, 2017 and 2016, management had both the intent and ability to hold impaired securities, and no impairment was evaluated as other than temporary. As a result, no impairment losses were recognized on securities during the years ended December 31, 2017, 2016, or 2015.

During the year ended December 31, 2017, the Company sold 16 securities classified as available-for-sale and 1 security classified as held-to-maturity. Of the available-for-sale securities, 13 securities were sold with gains totaling $449,000 and 3 securities were sold at a loss of $109,000 for a net gain of $340,000. The decision to sell the 1 held-to-maturity security, which was sold at a gain of $7,000, was based on the pre-refunding of the bond which would accelerate the maturity of the bond by 15 years with an anticipated call date within six months. During the year ended December 31, 2016, the Company sold 2 securities classified as available-for-sale at a gross gain of $20,000. During the year ended December 31, 2015, the Company sold 22 securities classified as available-for-sale at a net gain of $1.2 million. Of the 22 securities sold, 12 were sold with gains totaling $1.4 million and 10 securities were sold at a loss of $135,000.

Securities with an aggregate carrying value of approximately $177.9 million and $293.4 million at December 31, 2017 and 2016, respectively, were pledged to secure public funds on deposit and for other purposes required or permitted by law.