Investment Securities

3 Months Ended

Mar. 31, 2019

Investments, Debt and Equity Securities [Abstract]

The amortized cost and fair value of investment securities are shown in the following tables. Management performs a quarterly evaluation of investment securities for any other-than-temporary impairment. For the three-month periods ended March 31, 2019 and 2018, there were no investment securities deemed to be other-than-temporarily impaired.

Investment securities at March 31, 2019, were as follows:



Debt Securities Available-for-Sale (In thousands)	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Estimated Fair Value
U.S. Government sponsored entities' asset-backed securities	$	985,045	$	4,924	$	11,979	$	977,990
Total	$	985,045	$	4,924	$	11,979	$	977,990



Debt Securities Held-to-Maturity (In thousands)	Amortized Cost		Gross Unrecognized Holding Gains		Gross Unrecognized Holding Losses		Estimated Fair Value
U.S. Government sponsored entities' asset-backed securities	$	46,462	$	154	$	339	$	46,277
Obligations of states and political subdivisions	304,697		8,776		$	130	313,343
Total	$	351,159	$	8,930	$	469	$	359,620

Investment securities with unrealized/unrecognized losses at March 31, 2019, were as follows:



	Unrealized/unrecognized loss position for less than 12 months				Unrealized/unrecognized loss position for 12 months or longer				Total
(In thousands)	Fair value		Unrealized/unrecognized losses		Fair value		Unrealized/unrecognized losses		Fair value		Unrealized/unrecognized losses
Debt Securities Available-for-Sale
U.S. Government sponsored entities' asset-backed securities	$	—	$	—	$	519,644	$	11,979	$	519,644	$	11,979
Total	$	—	$	—	$	519,644	$	11,979	$	519,644	$	11,979
Debt Securities Held-to-Maturity
U.S. Government sponsored entities' asset-backed securities	$	—	$	—	$	33,392	$	339	$	33,392	$	339
Obligations of states and political subdivisions	—		$	—	33,298		130		$	33,298	130
Total	$	—	$	—	$	66,690	$	469	$	66,690	$	469

Investment securities at December 31, 2018, were as follows:



Debt Securities Available-for-Sale (In thousands)	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Estimated Fair Value
U.S. Government sponsored entities' asset-backed securities	$	1,028,883	$	453	$	25,915	$	1,003,421
Total	$	1,028,883	$	453	$	25,915	$	1,003,421



Debt Securities Held-to-Maturity (In thousands)	Amortized Cost		Gross Unrecognized Holding Gains		Gross Unrecognized Holding Losses		Estimated Fair Value
Obligations of states and political subdivisions	$	305,278	$	3,202	$	2,672	$	305,808
U.S. Government sponsored entities' asset-backed securities	46,530		87		1,003		45,614
Total	$	351,808	$	3,289	$	3,675	$	351,422

Investment securities with unrealized/unrecognized losses at December 31, 2018, were as follows:



	Unrealized/unrecognized loss position for less than 12 months				Unrealized/unrecognized loss position for 12 months or longer				Total
(In thousands)	Fair value		Unrealized/unrecognized losses		Fair value		Unrealized/unrecognized losses		Fair value		Unrealized/unrecognized losses
Debt Securities Available-for-Sale
U.S. Government sponsored entities' asset-backed securities	$	506,280	$	5,998	$	449,569	$	19,917	$	955,849	$	25,915
Total	$	506,280	$	5,998	$	449,569	$	19,917	$	955,849	$	25,915
Debt Securities Held-to-Maturity
Obligations of states and political subdivisions	$	91,960	$	1,095	$	70,723	$	1,577	$	162,683	$	2,672
U.S. Government sponsored entities' asset-backed securities	32,656		838		6,931		165		39,587		1,003
Total	$	124,616	$	1,933	$	77,654	$	1,742	$	202,270	$	3,675

Management does not believe any of the unrealized/unrecognized losses at March 31, 2019 or December 31, 2018 represented other-than-temporary impairment. Should the impairment of any of these securities become other-than-temporary, the cost basis of the investment will be reduced and the resulting loss recognized within net income in the period the other-than-temporary impairment is identified.

Park’s U.S. Government sponsored entities' asset-backed securities consist primarily of 15-year residential mortgage-backed securities and collateralized mortgage obligations.

The amortized cost and estimated fair value of investments in debt securities at March 31, 2019, are shown in the following table by contractual maturity, except for asset-backed securities, which are shown as a single total, due to the unpredictability of the timing of principal repayments.



Securities Available-for-Sale (In thousands)	Amortized cost		Fair value		Tax equivalent yield
U.S. Government sponsored entities' asset-backed securities	$	985,045	$	977,990	2.35	%



Securities Held-to-Maturity (In thousands)	Amortized cost		Fair value		Tax equivalent yield⁽¹⁾
Obligations of state and political subdivisions:
Due five through ten years	$	4,024	$	4,098	3.04	%
Due over ten years	300,673		309,245		3.69	%
Total ⁽¹⁾	$	304,697	$	313,343	3.68	%

U.S. Government sponsored entities' asset-backed securities	$	46,462	$	46,277	2.83	%

(1) The tax equivalent yield for obligations of state and political subdivisions includes the effects of a taxable equivalent adjustment using a 21% federal corporate income tax rate.

There were no sales of investment securities during the three-month period ended March 31, 2019. During the three-month period ended March 31, 2018, Park sold certain AFS debt securities with a book value of $245.0 million at a gross loss of $2.6 million and sold certain AFS debt securities with a book value of $2.0 million at a gross gain of $60,000. Additionally, during the three-month period ended March 31, 2018, Park sold certain HTM debt securities with a book value of $7.4 million at a gross gain of $291,000. These HTM securities had been paid down by 96.3% of the principal outstanding at acquisition.

Investment securities having a book value of $597 million and $634 million at March 31, 2019 and December 31, 2018, respectively, were pledged to collateralize government and trust department deposits in accordance with federal and state requirements, to secure repurchase agreements sold and as collateral for Federal Home Loan Bank ("FHLB") advance borrowings.