v3.26.1
Investment Securities
3 Months Ended
Mar. 31, 2026
Investments, Debt and Equity Securities [Abstract]  
Investment Securities Investment Securities
As of March 31, 2026, the Company had $3.24 billion and $267.7 million in available for sale debt securities and held to maturity debt securities, respectively. Many factors, including lack of liquidity in the secondary market for certain securities, variations in pricing information, changes in interest rates, regulatory actions, changes in the business environment or any changes in the competitive marketplace, could have an adverse effect on the Company’s investment portfolio.
Available for Sale Debt Securities
The following tables present the amortized cost, gross unrealized gains, gross unrealized losses and the fair value for available for sale debt securities as of March 31, 2026 and December 31, 2025 (in thousands):
March 31, 2026
Amortized
cost
Gross
unrealized
gains
Gross
unrealized
losses
Fair
value
U.S. Treasury obligations$274,883 106 (7,629)267,360 
Government-agency obligations29,942 709 (7)30,644 
Mortgage-backed securities2,798,914 12,922 (121,783)2,690,053 
Asset-backed securities40,193 433 (302)40,324 
State and municipal obligations119,072 802 (8,182)111,692 
Corporate obligations96,749 5,113 (1,868)99,994 
$3,359,753 20,085 (139,771)3,240,067 
December 31, 2025
Amortized
cost
Gross
unrealized
gains
Gross
unrealized
losses
Fair
value
U.S. Treasury obligations$274,500 190 (7,946)266,744 
Government-agency obligations32,693 877 (31)33,539 
Mortgage-backed securities2,705,346 23,454 (116,453)2,612,347 
Asset-backed securities41,619 409 (267)41,761 
State and municipal obligations119,173 1,249 (7,423)112,999 
Corporate obligations93,498 5,429 (1,561)97,366 
$3,266,829 31,608 (133,681)3,164,756 
Accrued interest on available for sale debt securities, which is excluded from the amortized cost, totaled $11.4 million and $10.9 million as of March 31, 2026 and December 31, 2025, respectively, and is presented within total accrued interest receivable on the Consolidated Statements of Financial Condition.
The amortized cost and fair value of available for sale debt securities as of March 31, 2026, by contractual maturity, are shown below (in thousands). Expected maturities may differ from contractual maturities due to prepayment or early call privileges of the issuer.
March 31, 2026
Amortized
cost
Fair
value
Due in one year or less$140,509 139,735 
Due after one year through five years166,889 160,626 
Due after five years through ten years116,601 117,600 
Due after ten years66,705 61,085 
Securities without a contractual maturity (1)
2,869,049 2,761,021 
$3,359,753 3,240,067 
(1) Residential mortgage-backed securities, other asset-backed securities and government-agency obligations are not included in the maturity categories as actual maturities may differ from contractual maturities because the underlying loans may be called or prepaid without penalties.
For the three months ended March 31, 2026, no securities were sold or called from the available for sale debt securities portfolio. For March 31, 2025, proceeds from sales on securities in the available for sale debt portfolio totaled $1.7 million with gross gains of $87,000 and no losses recognized, while calls from securities from the available for sale debt portfolio totaled $9.6 million with no gross gains and no losses recognized.
The following table shows gross unrealized losses and estimated fair value of available for sale debt securities, aggregated by investment category and length of time that individual investment securities have been in a continuous loss position as of March 31, 2026 and December 31, 2025 (in thousands):
March 31, 2026
Less Than 12 months12 Months or MoreTotal
 
Fair
value
Unrealized Losses
Fair
value
Unrealized Losses
Fair
value
Unrealized Losses
Available-for-sale:
U.S. Treasury obligations$— — 246,199 (7,629)246,199 (7,629)
Government-agency obligations— — 2,154 (7)2,154 (7)
Mortgage-backed securities641,639 (4,860)980,474 (116,923)1,622,113 (121,783)
Asset-backed securities 12,539 (98)8,800 (204)21,339 (302)
State and municipal obligations19,101 (442)63,936 (7,740)83,037 (8,182)
Corporate obligations11,768 (232)18,635 (1,636)30,403 (1,868)
Total$685,047 (5,632)1,320,198 (134,139)2,005,245 (139,771)
December 31, 2025
Less Than 12 months12 Months or MoreTotal
 
Fair
value
Unrealized Losses
Fair
value
Unrealized Losses
Fair
value
Unrealized Losses
Available-for-sale:
U.S. Treasury obligations$— — 245,675 (7,946)245,675 (7,946)
Government-agency obligations8,541 (31)— — 8,541 (31)
Mortgage-backed securities133,316 (4,119)984,261 (112,334)1,117,577 (116,453)
Asset-backed securities 20,493 (129)1,605 (138)22,098 (267)
State and municipal obligations21,613 (665)53,173 (6,758)74,786 (7,423)
Corporate obligations8,994 (6)18,742 (1,555)27,736 (1,561)
Total$192,957 (4,949)1,303,456 (128,732)1,496,412 (133,681)
The number of available for sale debt securities in an unrealized loss position as of March 31, 2026 totaled 471, compared with 406 as of December 31, 2025. The increase in the number of securities in an unrealized loss position as of March 31, 2026 was due to higher current market interest rates compared to rates as of December 31, 2025. All securities in an unrealized loss position were investment grade as of March 31, 2026.
Held to Maturity Debt Securities
The following tables present the amortized cost, gross unrealized gains, gross unrealized losses and the estimated fair value for held to maturity debt securities excluding allowances for credit losses of $15,000 and $16,000, as of March 31, 2026 and December 31, 2025 (in thousands):
March 31, 2026
Amortized
cost
Gross
unrealized
gains
Gross
unrealized
losses
Fair
value
Government-agency obligations$1,000 — (11)989 
State and municipal obligations265,726 72 (7,847)257,951 
Corporate obligations942 — (7)935 
$267,668 72 (7,865)259,875 
December 31, 2025
Amortized
cost
Gross
unrealized
gains
Gross
unrealized
losses
Fair
value
Government-agency obligations$3,400 — (22)3,378 
State and municipal obligations276,600 156 (7,045)269,711 
Corporate obligations2,143 — (14)2,129 
$282,143 156 (7,081)275,218 
Accrued interest on held to maturity debt securities, which is excluded from the amortized cost, totaled $2.5 million and $2.6 million as of March 31, 2026 and December 31, 2025, respectively, and is presented within total accrued interest receivable on the Consolidated Statements of Financial Condition.
The Company generally purchases securities for long-term investment purposes, and differences between amortized cost and fair value may fluctuate during the investment period. There were no sales of securities from the held to maturity debt securities portfolio for the three months ended March 31, 2026 and 2025. For the three months ended March 31, 2026, proceeds from calls of securities in the held to maturity debt securities portfolio totaled $2.8 million, with no gross gains and no gross losses. For the three months ended March 31, 2025, proceeds from calls of securities in the held to maturity debt securities portfolio totaled $5.0 million with no gross gains and no gross losses.
The amortized cost and fair value of investment securities in the held to maturity debt securities portfolio as of March 31, 2026 by contractual maturity are shown below (in thousands). Expected maturities may differ from contractual maturities due to prepayment or early call privileges of the issuer.
The amortized cost and fair value of held to maturity debt securities as of March 31, 2026 by contractual maturity, excluding allowances for credit losses of $15,000 as of March 31, 2026 are shown below (in thousands). Expected maturities may differ from contractual maturities due to prepayment or early call privileges of the issuer.
March 31, 2026
Amortized
cost
Fair
value
Due in one year or less$45,294 45,227 
Due after one year through five years147,661 146,533 
Due after five years through ten years71,626 65,663 
Due after ten years3,087 2,452 
$267,668 259,875 

The number of held to maturity debt securities in an unrealized loss position as of March 31, 2026 totaled 216, compared with 221 as of December 31, 2025. The decrease in the number of securities in an unrealized loss position as of March 31, 2026, was due to lower current market interest rates compared to rates as of December 31, 2025.
Management measures expected credit losses on held to maturity debt securities on a collective basis by security type. Management classifies the held to maturity debt securities portfolio into the following security types:
Government-agency obligations;
Mortgage-backed securities;
State and municipal obligations; and
Corporate obligations.

All of the agency obligations held by the Company are issued by U.S. government entities and agencies. These securities are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major rating agencies and have a long history of no credit losses. The majority of the state and municipal and corporate obligations carry credit ratings from the rating agencies as of March 31, 2026, that were no lower than an A rating and the Company had no securities rated BBB or worse by Moody’s Ratings ("Moody's").
Credit Quality Indicators. The following table provides the amortized cost of held to maturity debt securities by credit rating as of March 31, 2026 and December 31, 2025 (in thousands):
March 31, 2026
Total PortfolioAAAAAABBBNot RatedTotal
Government-agency obligations$1,000 — — — — 1,000 
State and municipal obligations43,957 191,635 17,995 — 12,139 265,726 
Corporate obligations— 572 370 — — 942 
$44,957 192,207 18,365 — 12,139 267,668 
December 31, 2025
Total PortfolioAAAAAABBBNot RatedTotal
Government-agency obligations$3,400 — — — — 3,400 
State and municipal obligations44,930 199,977 20,896 — 10,797 276,600 
Corporate obligations— 573 1,570 — — 2,143 
$48,330 200,550 22,466 — 10,797 282,143 
Credit quality indicators are metrics that provide information regarding the relative credit risk of debt securities. As of March 31, 2026, the held to maturity debt securities portfolio was comprised of 17% rated AAA, 72% rated AA, 7% rated A, and 4% either below an A rating or not rated by Moody’s or Standard and Poor’s.
The following table shows gross unrealized losses and estimated fair value of held to maturity debt securities, aggregated by investment category and length of time that individual investment securities have been in a continuous loss position as of March 31, 2026 and December 31, 2025 (in thousands):
March 31, 2026
Less Than 12 months12 Months or MoreTotal
 
Fair
value
Unrealized Losses
Fair
value
Unrealized Losses
Fair
value
Unrealized Losses
Held-to-maturity:
Government-agency obligations$— — 989 (11)989 (11)
State and municipal obligations42,144 (177)87,830 (7,670)129,974 (7,847)
Corporate obligations— — 934 (7)934 (7)
Total$42,144 (177)89,753 (7,688)131,897 (7,865)
December 31, 2025
Less Than 12 months12 Months or MoreTotal
 
Fair
value
Unrealized Losses
Fair
value
Unrealized Losses
Fair
value
Unrealized Losses
Held-to-maturity:
Government-agency obligations$— — 3,388 (22)3,388 (22)
State and municipal obligations3,353 (1)127,012 (7,044)130,365 (7,045)
Corporate obligations— — 2,129 (14)2,129 (14)
Total$3,353 (1)132,529 (7,080)135,882 (7,081)