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Securities
3 Months Ended
Mar. 31, 2026
Investments, Debt and Equity Securities [Abstract]  
Securities Securities
The following tables present the amortized cost, gross unrealized gains and losses, allowance for credit losses, and fair value by major categories of AFS and HTM debt securities as of March 31, 2026 and December 31, 2025:
March 31, 2026
($ in thousands)
Amortized Cost (1)
Gross Unrealized GainsGross Unrealized LossesFair Value
AFS debt securities:
U.S. Treasury securities$1,256,350 $495 $(19,058)$1,237,787 
U.S. government agency and U.S. government-sponsored enterprise debt securities287,503 — (31,640)255,863 
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities (2):
Commercial mortgage-backed securities277,947 74 (27,359)250,662 
Residential mortgage-backed securities11,004,372 53,571 (213,506)10,844,437 
Municipal securities275,348 (37,394)237,959 
Non-agency mortgage-backed securities:
Commercial mortgage-backed securities197,286 — (22,416)174,870 
Residential mortgage-backed securities431,846 — (58,349)373,497 
Corporate debt securities535,158 — (87,575)447,583 
Foreign government bonds249,263 461 (9,329)240,395 
Asset-backed securities30,965 — (535)30,430 
Total AFS debt securities14,546,038 54,606 (507,161)14,093,483 
HTM debt securities:
U.S. Treasury securities542,059 — (16,011)526,048 
U.S. government agency and U.S. government-sponsored enterprise debt securities1,007,937 — (152,476)855,461 
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities (3):
Commercial mortgage-backed securities470,484 — (70,288)400,196 
Residential mortgage-backed securities653,648 — (125,740)527,908 
Municipal securities184,850 — (41,460)143,390 
Total HTM debt securities2,858,978  (405,975)2,453,003 
Total debt securities$17,405,016 $54,606 $(913,136)$16,546,486 
Refer to table footnotes on the following page.
December 31, 2025
($ in thousands)
Amortized Cost (1)
Gross Unrealized GainsGross Unrealized Losses
Allowance for Credit Losses
Fair Value
AFS debt securities:
U.S. Treasury securities$1,010,053 $837 $(16,977)$— $993,913 
U.S. government agency and U.S. government-sponsored enterprise debt securities287,687 — (30,033)— 257,654 
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities (2):
Commercial mortgage-backed securities292,564 86 (27,312)— 265,338 
Residential mortgage-backed securities10,251,714 68,588 (187,649)— 10,132,653 
Municipal securities277,275 20 (34,193)— 243,102 
Non-agency mortgage-backed securities:
Commercial mortgage-backed securities214,987 — (22,139)(1,900)190,948 
Residential mortgage-backed securities452,208 — (58,421)— 393,787 
Corporate debt securities554,158 (89,183)— 464,981 
Foreign government bonds247,249 437 (9,231)— 238,455 
Asset-backed securities31,886 — (497)— 31,389 
Total AFS debt securities 13,619,781 69,974 (475,635)(1,900)13,212,220 
HTM debt securities:
U.S. Treasury securities540,666 — (15,779)— 524,887 
U.S. government agency and U.S. government-sponsored enterprise debt securities1,007,055 — (146,921)— 860,134 
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities (3):
Commercial mortgage-backed securities474,747 — (69,471)— 405,276 
Residential mortgage-backed securities662,127 — (124,176)— 537,951 
Municipal securities185,463 — (33,965)— 151,498 
Total HTM debt securities2,870,058  (390,312) 2,479,746 
Total debt securities$16,489,839 $69,974 $(865,947)$(1,900)$15,691,966 
(1)Amortized cost excludes accrued interest receivables which are presented within Other assets on the Consolidated Balance Sheet. As of both March 31, 2026 and December 31, 2025, the accrued interest receivables were $54 million. For the Company’s accounting policy related to debt securities’ accrued interest receivables, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Allowance for Credit Losses on Available-for-Sale Debt Securities and Allowance for Credit Losses on Held-to-Maturity Debt Securities to the Consolidated Financial Statements in the Company’s 2025 Form 10-K.
(2)Includes GNMA AFS debt securities with amortized cost and fair value both totaling $10.3 billion and $9.6 billion as of March 31, 2026 and December 31, 2025, respectively.
(3)Includes GNMA HTM debt securities totaling $77 million of amortized cost and $63 million of fair value as of March 31, 2026, and $79 million of amortized cost and $65 million of fair value as of December 31, 2025.
Unrealized Losses of Available-for-Sale Debt Securities

The following tables present the fair value and the associated gross unrealized losses of the Company’s AFS debt securities in a continuous unrealized loss position, aggregated by investment category and loss duration as of March 31, 2026 and December 31, 2025.
March 31, 2026
Less Than 12 Months12 Months or MoreTotal
($ in thousands)Fair ValueGross Unrealized LossesFair ValueGross Unrealized LossesFair ValueGross Unrealized Losses
AFS debt securities:
U.S. Treasury securities$510,306 $(5,956)$577,595 $(13,102)$1,087,901 

$(19,058)
U.S. government agency and U.S. government sponsored enterprise debt securities— — 255,863 (31,640)255,863 (31,640)
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities:
Commercial mortgage-backed securities3,512 (57)242,595 (27,302)246,107 (27,359)
Residential mortgage-backed securities2,834,504 (31,455)1,462,115 (182,051)4,296,619 (213,506)
Municipal securities1,950 (42)233,125 (37,352)235,075 (37,394)
Non-agency mortgage-backed securities:
Commercial mortgage-backed securities— — 174,870 (22,416)174,870 (22,416)
Residential mortgage-backed securities— — 373,497 (58,349)373,497 (58,349)
Corporate debt securities— — 447,583 (87,575)447,583 (87,575)
Foreign government bonds— — 40,671 (9,329)40,671 (9,329)
Asset-backed securities— — 30,430 (535)30,430 (535)
Total AFS debt securities$3,350,272 $(37,510)$3,838,344 $(469,651)$7,188,616 $(507,161)
December 31, 2025
Less Than 12 Months12 Months or MoreTotal
($ in thousands)Fair ValueGross Unrealized LossesFair ValueGross Unrealized LossesFair ValueGross Unrealized Losses
AFS debt securities:
U.S. Treasury securities$323,019 $(1,627)$575,638 $(15,350)$898,657 $(16,977)
U.S. government agency and U.S. government-sponsored enterprise debt securities— — 257,654 (30,033)257,654 (30,033)
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities:
Commercial mortgage-backed securities— — 256,503 (27,312)256,503 (27,312)
Residential mortgage-backed securities1,052,833 (5,480)1,582,952 (182,169)2,635,785 (187,649)
Municipal securities— — 237,214 (34,193)237,214 (34,193)
Non-agency mortgage-backed securities:
Commercial mortgage-backed securities— — 190,948 (22,139)190,948 (22,139)
Residential mortgage-backed securities— — 393,787 (58,421)393,787 (58,421)
Corporate debt securities— — 454,975 (89,183)454,975 (89,183)
Foreign government bonds— — 90,769 (9,231)90,769 (9,231)
Asset-backed securities— — 31,389 (497)31,389 (497)
Total AFS debt securities$1,375,852 $(7,107)$4,071,829 $(468,528)$5,447,681 $(475,635)
As of March 31, 2026, the Company had 467 AFS debt securities in a gross unrealized loss position, primarily consisting of 261 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities, 45 corporate debt securities and 61 non-agency mortgage-backed securities. In comparison, as of December 31, 2025, the Company had 429 AFS debt securities in a gross unrealized loss position, primarily consisting of 222 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities, 47 corporate debt securities and 66 non-agency mortgage-backed securities.

Allowance for Credit Losses on Available-for-Sale Debt Securities

The Company evaluates each AFS debt security where the fair value declines below amortized cost. For a discussion of the factors and criteria the Company uses in analyzing securities for impairment related to credit losses, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Allowance for Credit Losses on Available-for-Sale Debt Securities to the Consolidated Financial Statements in the Company’s 2025 Form 10-K.

The gross unrealized losses presented in the preceding tables were primarily attributable to interest rate movement and the widening of liquidity and/or credit spreads. U.S. Treasury, U.S. government agency, U.S. government-sponsored agency, and U.S. government-sponsored enterprise debt and mortgage-backed securities are issued, guaranteed, or otherwise supported by the U.S. government and have a zero credit loss assumption. The remaining securities that were in an unrealized loss position as of March 31, 2026 were mainly comprised of the following:

Corporate debt securities — The market value movement as of March 31, 2026 was primarily due to interest rate movement and spread change. A portion of the corporate debt securities is comprised of subordinated debt securities issued by U.S. banks. These securities are nearly all rated investment grade by nationally recognized statistical rating organizations (“NRSROs”) and issued by well-capitalized financial institutions with strong profitability. The contractual payments from these corporate debt securities have been and are expected to be received on time. The Company will continue to monitor the market developments in the banking sector and the credit performance of these securities.
Non-agency mortgage-backed securities — The market value movement for the majority of these securities as of March 31, 2026 was primarily due to interest rate movement and spread change. A substantial majority of the non-agency mortgage-backed securities are rated investment grade by NRSROs or have high priority in the cash flow waterfall within the securitization structure, and the contractual payments have historically been on time. Accordingly, the Company believes the risk of credit losses on these securities is low.

As of both March 31, 2026 and December 31, 2025, the Company intended to hold the AFS debt securities with unrealized losses through the anticipated recovery period and it was more-likely-than-not that the Company would not have to sell these securities before the recovery of their amortized cost. The issuers of these securities have not, to the Company’s knowledge, established any cause for default on these securities. As a result, the Company expects to recover the entire amortized cost basis of these securities.

There was no allowance for credit losses recorded against these securities as of March 31, 2026, compared with an allowance for credit losses of $2 million as of December 31, 2025, related to a non-agency commercial mortgage-backed security that experienced a deterioration in both its credit rating and expected cash flows, resulting in its fair value falling below amortized cost. A $192 thousand reversal of credit losses was recognized for the three months ended March 31, 2026, as a result of the sale of this security, compared with no provision for credit losses for the three months ended March 31, 2025

Allowance for Credit Losses on Held-to-Maturity Debt Securities

The Company separately evaluates its HTM debt securities for any credit losses using an expected loss model, similar to the methodology used for loans. For additional information on the Company’s credit loss methodology, refer to Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Allowance for Credit Losses on Held-to-Maturity Debt Securities to the Consolidated Financial Statements in the Company’s 2025 Form 10-K.
The Company monitors the credit quality of the HTM debt securities using external credit ratings. As of March 31, 2026, all HTM securities were rated investment grade by NRSROs and issued, guaranteed, or supported by U.S. government entities and agencies. Accordingly, the Company applied a zero credit loss assumption and no allowance for credit losses was recorded as of both March 31, 2026 and December 31, 2025. Overall, the Company believes that the credit support levels of the debt securities are strong and based on current assessments and macroeconomic forecasts, expects that full contractual cash flows will be received.

Realized Gains and Reversal of Credit Losses

The following table presents the gross realized gains from the sales of AFS debt securities (pre-tax), the reversal of credit losses, and the related tax expense included in earnings for the three months ended March 31, 2026 and 2025:
Three Months Ended March 31,
($ in thousands)20262025
Gross realized gains from sales$616 $131 
Reversal of credit losses
$192 $— 
Related tax expense
$239 $39 

Interest Income

The following table presents the composition of interest income on debt securities for the three months ended March 31, 2026 and 2025:
Three Months Ended March 31,
($ in thousands)20262025
Taxable interest$156,567 $142,890 
Nontaxable interest3,611 4,894 
Total interest income on debt securities$160,178 $147,784 
Contractual Maturities of Available-for-Sale and Held-to-Maturity Debt Securities

The following tables present the contractual maturities, amortized cost, fair value and weighted-average yields of AFS and HTM debt securities as of March 31, 2026. Expected maturities will differ from contractual maturities on certain securities as the issuers and borrowers of the underlying collateral may have the right to call or prepay obligations with or without prepayment penalties.
($ in thousands)Within One Year
After One Year through Five Years
After Five Years through Ten Years After Ten Years Total
AFS debt securities:
U.S. Treasury securities
Amortized cost$490,798 $597,938 $167,614 $— $1,256,350 
Fair value482,999 589,040 165,748 — 1,237,787 
Weighted-average yield (1)
1.13%3.22%3.79%%2.48%
U.S. government agency and U.S. government-sponsored enterprise debt securities
Amortized cost1,677 50,000 178,331 57,495 287,503 
Fair value1,656 47,873 157,707 48,627 255,863 
Weighted-average yield (1)
2.85%2.00%2.08%2.16%2.09%
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities
Amortized cost— 48,534 90,730 11,143,055 11,282,319 
Fair value— 46,851 83,689 10,964,559 11,095,099 
Weighted-average yield (1) (2)
%2.86%2.90%4.74%4.71%
Municipal securities
Amortized cost7,800 17,636 22,598 227,314 275,348 
Fair value7,720 17,155 19,344 193,740 237,959 
Weighted-average yield (1) (2)
1.21%2.58%2.40%2.26%2.26%
Non-agency mortgage-backed securities
Amortized cost— — — 629,132 629,132 
Fair value— — — 548,367 548,367 
Weighted-average yield (1)
%%%2.24%2.24%
Corporate debt securities
Amortized cost15,158 46,000 449,000 25,000 535,158 
Fair value15,058 42,999 366,134 23,392 447,583 
Weighted-average yield (1)
4.70%4.31%2.36%1.80%2.57%
Foreign government bonds
Amortized cost69,648 129,615 50,000 — 249,263 
Fair value69,779 129,945 40,671 — 240,395 
Weighted-average yield (1)
2.29%2.46%1.75%%2.27%
Asset-backed securities
Amortized cost— — — 30,965 30,965 
Fair value— — — 30,430 30,430 
Weighted-average yield (1)
%%%4.36%4.36%
Total AFS debt securities
Amortized cost$585,081 $889,723 $958,273 $12,112,961 $14,546,038 
Fair value$577,212 $873,863 $833,293 $11,809,115 $14,093,483 
Weighted-average yield (1)
1.37%3.06%2.58%4.54%4.19%
($ in thousands)Within One Year
After One Year through Five Years
After Five Years through Ten YearsAfter Ten YearsTotal
HTM debt securities:
U.S. Treasury securities
Amortized cost$74,402$467,657$$$542,059
Fair value72,898453,150526,048
Weighted-average yield (1)
0.83%1.08%%%1.05%
U.S. government agency and U.S. government-sponsored enterprise debt securities
Amortized cost129,956812,19165,7901,007,937
Fair value118,920683,74252,799855,461
Weighted-average yield (1)
%1.37%1.96%2.12%1.90%
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities
Amortized cost55,823184,457883,8521,124,132
Fair value51,287159,382717,435928,104
Weighted-average yield (1) (2)
%1.51%1.81%1.67%1.69%
Municipal securities
Amortized cost13,884170,966184,850
Fair value11,791131,599143,390
Weighted-average yield (1) (2)
%%2.35%1.99%2.02%
Total HTM debt securities
Amortized cost$74,402$653,436$1,010,532$1,120,608$2,858,978
Fair value$72,898$623,357$854,915$901,833$2,453,003
Weighted-average yield (1)
0.83%1.17%1.94%1.75%1.66%
(1)Weighted-average yields are computed based on amortized cost balances.
(2)Yields on tax-exempt securities are not presented on a tax-equivalent basis.

As of March 31, 2026 and December 31, 2025, AFS and HTM debt securities with carrying values of $4.9 billion and $4.6 billion, respectively, were pledged to secure borrowings and for other purposes required or permitted by law. As of March 31, 2026 and December 31, 2025, AFS and HTM debt securities with fair values of $6.9 billion and $4.8 billion, respectively, were prepositioned for the Federal Reserve Bank (“FRB”) Standing Repurchase Agreement Facility.

Restricted Equity Securities

The following table presents the restricted equity securities included in Other assets on the Consolidated Balance Sheet as of March 31, 2026 and December 31, 2025:
($ in thousands)March 31, 2026December 31, 2025
FRB of San Francisco stock
$66,586 $66,179 
FHLB stock87,111 87,305 
Total restricted equity securities$153,697 $153,484