Investment Securities

Available-for-sale

The following table summarizes Peoples’ available-for-sale investment securities at December 31:



(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
2016
Obligations of:
U.S. government sponsored agencies	$	1,000	$	—	$	—		$	1,000
States and political subdivisions	115,657		1,836		(263		)	117,230
Residential mortgage-backed securities	633,802		3,758		(10,993		)	626,567
Commercial mortgage-backed securities	19,337		41		(87		)	19,291
Bank-issued trust preferred securities	5,169		91		(361		)	4,899
Equity securities	2,052		6,969		(68		)	8,953
Total available-for-sale securities	$	777,017	$	12,695	$	(11,772	)	$	777,940
2015
Obligations of:
U.S. government sponsored agencies	$	2,908	$	58	$	—		$	2,966
States and political subdivisions	111,283		3,487		(44		)	114,726
Residential mortgage-backed securities	635,504		4,905		(8,116		)	632,293
Commercial mortgage-backed securities	23,770		119		(44		)	23,845
Bank-issued trust preferred securities	5,146		—		(511		)	4,635
Equity securities	1,693		4,627		(84		)	6,236
Total available-for-sale securities	$	780,304	$	13,196	$	(8,799	)	$	784,701

At both December 31, 2016 and 2015, Peoples’ investment in equity securities was comprised entirely of common stocks issued by various unrelated bank holding companies. At December 31, 2016, there were no securities of a single issuer that exceeded 10% of stockholders' equity.

The gross gains and gross losses realized by Peoples from sales of available-for-sale securities for the years ended December 31 were as follows:



(Dollars in thousands)	2016		2015		2014
Gross gains realized	$	933	$	795	$	1,136
Gross losses realized	3		66		738
Net gain realized	$	930	$	729	$	398

The cost of investment securities sold, and any resulting gain or loss, were based on the specific identification method and recognized as of the trade date.

The following table presents a summary of available-for-sale investment securities that had an unrealized loss at December 31:



	Less than 12 Months					12 Months or More					Total
(Dollars in thousands)	Fair Value		Unrealized Loss		No. of Securities	Fair Value		Unrealized Loss		No. of Securities	Fair Value		Unrealized Loss
2016
Obligations of:
States and political subdivisions	$	23,501	$	263	28	$	—	$	—	—	$	23,501	$	263
Residential mortgage-backed securities	427,088		8,495		108	46,631		2,498		22	473,719		10,993
Commercial mortgage-backed securities	7,770		87		4	—		—		—	7,770		87
Bank-issued trust preferred securities	—		—		—	2,637		361		3	2,637		361
Equity securities	263		3		1	110		65		1	373		68
Total	$	458,622	$	8,848	141	$	49,378	$	2,924	26	$	508,000	$	11,772
2015
Obligations of:
States and political subdivisions	$	7,662	$	38	8	$	213	$	6	1	$	7,875	$	44
Residential mortgage-backed securities	303,549		3,902		76	102,090		4,214		33	405,639		8,116
Commercial mortgage-backed securities	6,682		44		3	—		—		—	6,682		44
Bank-issued trust preferred securities	2,129		19		1	2,506		492		3	4,635		511
Equity securities	438		15		2	106		69		1	544		84
Total	$	320,460	$	4,018	90	$	104,915	$	4,781	38	$	425,375	$	8,799

Management systematically evaluates available-for-sale investment securities for other-than-temporary declines in fair value on a quarterly basis. At December 31, 2016, management concluded no individual securities were other-than-temporarily impaired since Peoples did not have the intent to sell, nor was it more likely than not that Peoples would be required to sell any of the securities with an unrealized loss prior to recovery. Further, the unrealized losses at both December 31, 2016 and 2015 were attributable to changes in market interest rates and spreads since the securities were purchased.

At December 31, 2016, approximately 99% of the fair value of mortgage-backed securities that had been at an unrealized loss position for twelve months or more were issued by U.S. government sponsored agencies. The remaining 1%, or two positions, consisted of privately issued mortgage-backed securities with all of the underlying mortgages originated prior to 2004. Both of these two positions had a fair value of less than 90% of their book value, with an aggregate book and fair value of $0.7 million and $0.5 million, respectively. Management has analyzed the underlying credit quality of these securities and concluded the unrealized losses were primarily attributable to the floating rate nature of these investments and the low number of loans remaining in these securities.

Furthermore, the unrealized losses with respect to the three bank-issued trust preferred securities that had been in an unrealized loss position for twelve months or more at December 31, 2016 were primarily attributable to the floating nature of those investments, the current interest rate environment and spreads within that sector.

The table below presents the amortized cost, fair value and total weighted-average yield of available-for-sale securities by contractual maturity at December 31, 2016. The weighted-average yields are based on the amortized cost. In some cases, the issuers may have the right to call or prepay obligations without call or prepayment penalties prior to the contractual maturity date. Rates are calculated on a fully tax-equivalent basis using a 35% federal income tax rate.



(Dollars in thousands)	Within 1 Year			1 to 5 Years			5 to 10 Years			Over 10 Years			Total
Amortized cost
Obligations of:
U.S. government sponsored agencies	$	1,000		$	—		$	—		$	—		$	1,000
States and political subdivisions	435			14,354			28,903			71,965			115,657
Residential mortgage-backed securities	2			14,225			33,180			586,395			633,802
Commercial mortgage-backed securities	—			3,246			14,267			1,824			19,337
Bank-issued trust preferred securities	—			—			—			5,169			5,169
Equity securities	—			—			—			—			2,052
Total available-for-sale securities	$	1,437		$	31,825		$	76,350		$	665,353		$	777,017
Fair value
Obligations of:
U.S. government sponsored agencies	$	1,000		$	—		$	—		$	—		$	1,000
States and political subdivisions	438			14,484			29,250			73,058			117,230
Residential mortgage-backed securities	2			14,020			33,389			579,156			626,567
Commercial mortgage-backed securities	—			3,287			14,185			1,819			19,291
Bank-issued trust preferred securities	—			—			—			4,899			4,899
Equity securities	—			—			—			—			8,953
Total available-for-sale securities	$	1,440		$	31,791		$	76,824		$	658,932		$	777,940
Total weighted-average yield	2.23		%	4.11		%	3.57		%	3.29		%	3.36		%

Held-to-Maturity

The following table summarizes Peoples’ held-to-maturity investment securities at December 31:



(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
2016
Obligations of:
States and political subdivisions	$	3,820	$	221	$	—		$	4,041
Residential mortgage-backed securities	33,858		432		(528		)	33,762
Commercial mortgage-backed securities	5,466		—		(42		)	5,424
Total held-to-maturity securities	$	43,144	$	653	$	(570	)	$	43,227
2015
Obligations of:
States and political subdivisions	$	3,831	$	394	$	(4	)	$	4,221
Residential mortgage-backed securities	35,367		363		(534		)	35,196
Commercial mortgage-backed securities	6,530		—		(94		)	6,436
Total held-to-maturity securities	$	45,728	$	757	$	(632	)	$	45,853

There were no gross gains or gross losses realized by Peoples from sales of held-to-maturity securities for the years ended December 31, 2016, 2015 and 2014.

The following table presents a summary of held-to-maturity investment securities that had an unrealized loss at December 31:



	Less than 12 Months					12 Months or More					Total
(Dollars in thousands)	Fair Value		Unrealized Loss		No. of Securities	Fair Value		Unrealized Loss		No. of Securities	Fair Value		Unrealized Loss
2016
Obligations of:
Residential mortgage-backed securities	$	12,139	$	476	3	$	963	$	52	1	$	13,102	$	528
Commercial mortgage-backed securities	5,424		42		1	—		—		—	5,424		42
Total	$	17,563	$	518	4	$	963	$	52	1	$	18,526	$	570
2015
Obligations of:
States and political subdivisions	$	—	$	—	—	$	319	$	4	1	$	319	$	4
Residential mortgage-backed securities	3,706		89		2	10,040		445		2	13,746		534
Commercial mortgage-backed securities	540		4		1	5,895		90		1	6,435		94
Total	$	4,246	$	93	3	$	16,254	$	539	4	$	20,500	$	632

The table below presents the amortized cost, fair value and total weighted-average yield of held-to-maturity securities by contractual maturity at December 31, 2016. The weighted-average yields are based on the amortized cost. In some cases, the issuers may have the right to call or prepay obligations without call or prepayment penalties prior to the contractual maturity date. Rates are calculated on a fully tax-equivalent basis using a 35% federal income tax rate.



(Dollars in thousands)	Within 1 Year			1 to 5 Years			5 to 10 Years			Over 10 Years			Total
Amortized cost
Obligations of:
States and political subdivisions	$	—		$	318		$	978		$	2,524		$	3,820
Residential mortgage-backed securities	—			—			4,623			29,235			33,858
Commercial mortgage-backed securities	—			—			—			5,466			5,466
Total held-to-maturity securities	$	—		$	318		$	5,601		$	37,225		$	43,144
Fair value
Obligations of:
States and political subdivisions	$	—		$	320		$	1,058		$	2,663		$	4,041
Residential mortgage-backed securities	—			—			4,643			29,119			33,762
Commercial mortgage-backed securities	—			—			—			5,424			5,424
Total held-to-maturity securities	$	—		$	320		$	5,701		$	37,206		$	43,227
Total weighted-average yield	—		%	6.16		%	3.03		%	3.66		%	3.60		%

Other Securities

Peoples' other investment securities on the Consolidated Balance Sheets consist largely of shares of the FHLB and the FRB.

Pledged Securities

Peoples had pledged available-for-sale investment securities with a carrying value of $517.9 million and $495.5 million at December 31, 2016 and 2015, respectively, and held-to-maturity investment securities with a carrying value of $20.0 million and $21.4 million at December 31, 2016 and 2015, respectively, to secure public and trust department deposits and repurchase agreements in accordance with federal and state requirements. Peoples also pledged available-for-sale investment securities with carrying values of $9.2 million and $11.1 million at December 31, 2016 and 2015, respectively, and held-to-maturity securities with carrying values of $22.2 million and $23.3 million at December 31, 2016 and 2015, respectively, to secure additional borrowing capacity at the FHLB and the FRB.