Securities

The amortized cost and fair value of securities available-for-sale at June 30, 2018 and December 31, 2017 are summarized as follows (in thousands):



	June 30, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. Government-sponsored enterprises (GSEs)	$	29,137	$	—	$	(1,009	)	$	28,128
Municipal securities	15,896		8		(320		)	15,584
Other debt securities	976		—		(65		)	911
Mortgage-backed securities (GSEs)	114,538		171		(2,755		)	111,954
	$	160,547	$	179	$	(4,149	)	$	156,577



	December 31, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. Government-sponsored enterprises (GSEs)	$	26,207	$	1	$	(432	)	$	25,776
Municipal securities	9,122		28		(147		)	9,003
Other debt securities	974		—		(24		)	950
Mortgage-backed securities (GSEs)	117,263		136		(1,184		)	116,215
	$	153,566	$	165	$	(1,787	)	$	151,944

At June 30, 2018 and December 31, 2017, securities with a fair value totaling approximately $113.5 million and $97.2 million, respectively were pledged to secure public funds and securities sold under agreements to repurchase.

For the three and six months ended June 30, 2018 and June 30, 2017, there were no available-for-sale securities sold. For the three and six months ended June 30, 2018, a security was called for less than the amortized cost resulting in a realized loss of $1,200.

The amortized cost and estimated fair value of securities at June 30, 2018, by contractual maturity for non-mortgage backed securities, are shown below (in thousands). Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.



	Amortized Cost		Fair Value
Due in one year or less	$	—	$	—
Due from one year to five years	21,554		20,901
Due from five years to ten years	13,995		13,366
Due after ten years	10,460		10,356
	46,009		44,623
Mortgage-backed securities	114,538		111,954
	$	160,547	$	156,577

Note 4. Securities, Continued

The following tables present the gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities available-for-sale have been in a continuous unrealized loss position, as of June 30, 2018 and December 31, 2017 (in thousands):



	As of June 30, 2018
	Less than 12 Months					12 Months or Greater					Total
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
U.S. Government- sponsored enterprises (GSEs)	$	14,862	$	(425	)	$	13,266	$	(584	)	$	28,128	$	(1,009	)
Municipal securities	11,966		(182		)	2,072		(138		)	14,038		(320		)
Other debt securities	—		—			911		(65		)	911		(65		)
Mortgage-backed securities (GSEs)	58,377		(1,654		)	29,911		(1,101		)	88,288		(2,755		)
	$	85,205	$	(2,261	)	$	46,160	$	(1,888	)	$	131,365	$	(4,149	)



	As of December 31, 2017
	Less than 12 Months					12 Months or Greater					Total
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
U.S. Government- sponsored enterprises (GSEs)	$	1,358	$	(1	)	$	13,420	$	(431	)	$	14,778	$	(432	)
Municipal securities	3,418		(43		)	2,112		(104		)	5,530		(147		)
Other debt securities	950		(24		)	—		—			950		(24		)
Mortgage-backed securities (GSEs)	61,332		(407		)	35,048		(777		)	96,380		(1,184		)
	$	67,058	$	(475	)	$	50,580	$	(1,312	)	$	117,638	$	(1,787	)

At June 30, 2018, the categories of temporarily impaired securities, and management’s evaluation of those securities, are as follows:

U.S. Government-sponsored enterprises: At June 30, 2018, 8 (or eight) investments in U.S. GSE securities had unrealized losses. These unrealized losses related principally to changes in market interest rates. The contractual terms of the investments do not permit the issuer to settle the securities at a price less than the amortized cost bases of the investments. Because the Bank does not intend to sell the investments and it is more likely than not that the Bank will not be required to sell the investments before recovery of their amortized cost bases, which may be maturity, the Bank does not consider these investments to be other-than temporarily impaired at June 30, 2018.

Municipal securities: At June 30, 2018, 21 (or twenty one) investments in obligations of municipal securities had unrealized losses. The Bank believes the unrealized losses on those investments were caused by the interest rate environment and do not relate to the underlying credit quality of the issuers. Because the Bank does not intend to sell the investments and it is not more likely than not that the Bank will be required to sell the investments before recovery of their amortized cost bases, which may be maturity, the Bank does not consider these investments to be other-than temporarily impaired at June 30, 2018.

Other debt securities: At June 30, 2018, 1 (or one) investment in other debt securities had unrealized losses. The Bank believes the unrealized loss on this investment was caused by the interest rate environment and does not relate to the underlying credit quality of the issuer. Because the Bank does not intend to sell the investment and it is not more likely than not that the Bank will be required to sell the investment before recovery of its amortized cost bases, which may be maturity, the Bank does not consider this investment to be other-than temporarily impaired at June 30, 2018.

Mortgage-backed securities: At June 30, 2018, 65 (or sixty five) investments in residential mortgage-backed securities had unrealized losses. This impairment is believed to be caused by the current interest rate environment. The contractual cash flows of those investments are guaranteed by an agency of the U.S. Government. Because the decline in market value is attributable to the current interest rate environment and not credit quality, and because the Bank does not intend to sell the investments and it is not more likely than not that the Bank will be required to sell the investments before recovery of their amortized cost bases, which may be maturity, the Bank does not deem these investments to be other-than-temporarily impaired at June 30, 2018.