
	June 30, 2021
(In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Debt securities available-for-sale
U.S. Treasury securities and obligations of U.S. government agencies	$	7,412	$	439	$	(2)	$	7,849

Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities	987,402		14,224		(5,906)		995,720

Private mortgage-backed securities and collateralized mortgage obligations	73,469		1,938		(218)		75,189

Collateralized loan obligations	209,835		22		(165)		209,692

Obligations of state and political subdivisions	32,288		2,038		—		34,326

Totals	$	1,310,406	$	18,661	$	(6,291)	$	1,322,776


Debt securities held-to-maturity
Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities	$	493,467	$	5,697	$	(9,875)	$	489,289

Totals	$	493,467	$	5,697	$	(9,875)	$	489,289


	December 31, 2020
(In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Debt securities available-for-sale
U.S. Treasury securities and obligations of U.S. government agencies	$	8,250	$	528	$	(1)	$	8,777
Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities	1,038,437		23,457		(1,240)		1,060,654
Private mortgage-backed securities and collateralized mortgage obligations	89,284		2,131		(210)		91,205
Collateralized loan obligations	202,563		279		(647)		202,195
Obligations of state and political subdivisions	33,005		2,321		—		35,326
Totals	$	1,371,539	$	28,716	$	(2,098)	$	1,398,157

Debt securities held-to-maturity
Mortgage-backed securities of U.S. government-sponsored entities	$	184,484	$	7,818	$	(123)	$	192,179


Totals	$	184,484	$	7,818	$	(123)	$	192,179

Proceeds from sales of securities for the three and six months ended June 30, 2021 were $56.2 million, resulting in gross gains of $0.2 million and gross losses of $0.3 million. For the three months ended June 30, 2020, proceeds from sales of securities were $64.5 million, which resulted in gross gains of $2.3 million and gross losses of $1.1 million. For the six months ended June 30, 2020, proceeds from sales of securities were $92.3 million, which resulted in gross gains of $2.4 million and gross losses of $1.3 million.

Also included in “Securities gains (losses), net” is an increase of $18 thousand and a decrease of $0.1 million for the three and six months ended June 30, 2021, respectively, and increases of $0.1 million and $0.2 million for the three and six months ended June 30, 2020, respectively, in the value of a CRA-qualified mutual fund.

During the first quarter of 2021, the Company reclassified debt securities with an amortized cost of $210.8 million from available-for-sale to held-to-maturity, as it has the ability and intent to hold these securities to maturity. These securities had net unrealized gains of $0.8 million at the date of transfer, which will continue to be reported in accumulated other comprehensive income, and will be amortized over the remaining life of the securities as an adjustment of yield. The effect on interest income of the amortization of net unrealized gains is offset by the amortization of the premium on the securities transferred.

The amortized cost and fair value of debt securities held-to-maturity and available-for-sale at June 30, 2021, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because prepayments of the underlying collateral for these securities may occur, due to the right to call or repay obligations with or without call or prepayment penalties. Securities not due at a single maturity date are shown separately.


	Held-to-Maturity				Available-for-Sale
(In thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in less than one year	$	—	$	—	$	400	$	402

Due after one year through five years	—		—		12,316		13,175

Due after five years through ten years	—		—		8,505		8,923

Due after ten years	—		—		18,479		19,675

	—		—		39,700		42,175

Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities	493,467		489,289		987,402		995,720

Private mortgage-backed securities and collateralized mortgage obligations	—		—		73,469		75,189

Collateralized loan obligations	—		—		209,835		209,692

Totals	$	493,467	$	489,289	$	1,310,406	$	1,322,776

The estimated fair value of a security is determined based on market quotations when available or, if not available, by using quoted market prices for similar securities, pricing models or discounted cash flows analyses, or using observable market data. The tables below indicate the fair value of available-for-sale debt securities with unrealized losses for which no allowance for credit losses has been recorded.


	June 30, 2021
	Less Than 12 Months				12 Months or Longer				Total
(In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Treasury securities and obligations of U.S. government agencies	$	—	$	—	$	251	$	(2)	$	251	$	(2)

Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities	538,907		(5,866)		4,389		(40)		543,296		(5,906)

Private mortgage-backed securities and collateralized mortgage obligations	14,979		(195)		1,738		(23)		16,717		(218)

Collateralized loan obligations	82,191		(108)		9,450		(57)		91,641		(165)



Totals	$	636,077	$	(6,169)	$	15,828	$	(122)	$	651,905	$	(6,291)


	December 31, 2020
	Less Than 12 Months				12 Months or Longer				Total
(In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Treasury securities and obligations of U.S. government agencies	$	—	$	—	$	256	$	(1)	$	256	$	(1)
Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities	203,405		(1,218)		569		(22)		203,974		(1,240)
Private mortgage-backed securities and collateralized mortgage obligations	23,997		(210)		—		—		23,997		(210)
Collateralized loan obligations	104,697		(102)		72,513		(545)		177,210		(647)

Totals	$	332,099	$	(1,530)	$	73,338	$	(568)	$	405,437	$	(2,098)

At June 30, 2021, the Company had $5.9 million of unrealized losses on mortgage-backed securities and collateralized mortgage obligations issued by government-sponsored entities having a fair value of $543.3 million. These securities are either explicitly or implicitly guaranteed by the U.S. government and have a long history of no credit losses. The implied government guarantee of principal and interest payments and the high credit rating of the portfolio provide sufficient basis for the current expectation that there is no risk of loss if default were to occur. Based on the assessment of all relevant factors, the Company believes that the unrealized loss positions on these debt securities are a function of changes in investment spreads and interest

At June 30, 2021, the Company had $0.2 million of unrealized losses on private label residential and commercial mortgage-backed securities and collateralized mortgage obligations having a fair value of $16.7 million. The collateral underlying these mortgage investments is primarily residential real estate. The securities have average credit support of 35%. Based on the assessment of all relevant factors, the Company believes that the unrealized loss positions on these debt securities are a function of changes in investment spreads and interest rate movements and not changes in credit quality, and expects to recover the entire amortized cost basis of these securities. Therefore, at June 30, 2021, no allowance for credit losses has been recorded.

At June 30, 2021, the Company had $0.2 million in unrealized losses in uncapped 3-month LIBOR floating rate collateralized loan obligations ("CLOs") having a fair value of $91.6 million. CLOs are special purpose vehicles and those in which the Company has invested acquire nearly all first-lien, broadly syndicated corporate loans across a diversified band of industries while providing support to senior tranche investors. As of June 30, 2021, these positions are in AAA and AA tranches, with average credit support of 34% and 23%, respectively. The Company evaluates the securities for potential credit losses by modeling expected loan-level defaults, recoveries, and prepayments for each CLO security. Based on the assessment of all relevant factors, the Company believes that the unrealized loss positions on these debt securities are a function of changes in investment spreads and interest rate movements and not changes in credit quality, and expects to recover the entire amortized cost basis of these securities. Therefore, at June 30, 2021, no allowance for credit losses has been recorded.

All HTM debt securities are issued by government-sponsored entities, which are either explicitly or implicitly guaranteed by the U.S. government and have a long history of no credit losses. While the potential for default on these securities may be something greater than zero, the long history with no credit losses, the implied government guarantee of principal and interest payments and the high credit rating of the HTM portfolio provide sufficient basis for the current expectation that there is no risk of loss if default were to occur. As a result, as of June 30, 2021, no allowance for credit losses has been recorded.

Included in other assets at June 30, 2021 is $31.2 million of Federal Home Loan Bank and Federal Reserve Bank stock stated at par value. The Company has not identified events or changes in circumstances that may have a significant adverse effect on the fair value of these cost method investment securities. Also included in other assets is a $6.4 million investment in a CRA-qualified mutual fund carried at fair value. Accrued interest receivable on AFS and HTM debt securities of $2.6 million and $0.8 million at June 30, 2021, respectively, and $3.2 million and $0.4 million at December 31, 2020, respectively, is also included in other assets.