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Fair Value of Financial Instruments
12 Months Ended
Dec. 31, 2020
Fair Value Disclosures [Abstract]  
Fair Value of Financial Instruments Fair Value of Financial Instruments
Fair Value Measurements
Our available-for-sale securities, derivative instruments and certain non-marketable and other equity securities are financial instruments recorded at fair value on a recurring basis. We make estimates regarding valuation of assets and liabilities measured at fair value in preparing our consolidated financial statements.
The following fair value hierarchy table presents information about our assets and liabilities that are measured at fair value on a recurring basis as of December 31, 2020:
(Dollars in thousands)
Level 1

Level 2

Level 3
Balance at December 31, 2020
Assets
Available-for-sale securities:
U.S. Treasury securities$4,469,728 $— $— $4,469,728 
U.S. agency debentures— 237,307 — 237,307 
Foreign government debt securities24,492 — — 24,492 
Residential mortgage-backed securities:
Agency-issued mortgage-backed securities
— 13,503,681 — 13,503,681 
Agency-issued collateralized mortgage obligations—fixed rate
— 8,106,564 — 8,106,564 
Agency-issued commercial mortgage-backed securities— 4,570,666 — 4,570,666 
Total available-for-sale securities4,494,220 26,418,218 — 30,912,438 
Non-marketable and other equity securities (fair value accounting):
Non-marketable securities:
Venture capital and private equity fund investments measured at net asset value
— — — 273,823 
Other equity securities in public companies43,344 237,460 — 280,804 
Total non-marketable and other equity securities (fair value
accounting)
43,344 237,460 — 554,627 
Other assets:
Foreign exchange forward and option contracts— 216,977 — 216,977 
Equity warrant assets— 11,221 192,217 203,438 
Client interest rate derivatives— 67,854 — 67,854 
Total assets$4,537,564 $26,951,730 $192,217 $31,955,334 
Liabilities
Foreign exchange forward and option contracts$— $210,833 $— $210,833 
Client interest rate derivatives— 26,646 — 26,646 
Total liabilities$— $237,479 $— $237,479 
The following fair value hierarchy table presents information about our assets and liabilities that are measured at fair value on a recurring basis as of December 31, 2019:
(Dollars in thousands)Level 1Level 2Level 3Balance at December 31, 2019
Assets
Available-for-sale securities:
U.S. Treasury securities$6,894,010 $— $— $6,894,010 
U.S. agency debentures— 99,547 — 99,547 
Foreign government debt securities9,038 — — 9,038 
Residential mortgage-backed securities:
Agency-issued mortgage-backed securities— 4,148,791 — 4,148,791 
Agency-issued collateralized mortgage obligations—fixed rate— 1,538,343 — 1,538,343 
Agency-issued commercial mortgage-backed securities— 1,325,190 — 1,325,190 
Total available-for-sale securities6,903,048 7,111,871 — 14,014,919 
Non-marketable and other equity securities (fair value accounting):
Non-marketable securities:
Venture capital and private equity fund investments measured at net asset value
— — — 265,263 
Venture capital and private equity fund investments not measured at net asset value (1)
— — 134 134 
Other equity securities in public companies17,290 41,910 — 59,200 
Total non-marketable and other equity securities (fair value
accounting)
17,290 41,910 134 324,597 
Other assets:
Foreign exchange forward and option contracts— 115,854 — 115,854 
Equity warrant assets— 4,435 161,038 165,473 
Interest rate swaps— 22,676 — 22,676 
Client interest rate derivatives— 28,811 — 28,811 
Total assets$6,920,338 $7,325,557 $161,172 $14,672,330 
Liabilities
Foreign exchange forward and option contracts$— $98,207 $— $98,207 
Interest rate swaps— 25,623 — 25,623 
Client interest rate derivatives— 14,154 — 14,154 
Total liabilities$— $137,984 $— $137,984 
(1)Included in Level 3 assets is $120 thousand attributable to noncontrolling interests calculated based on the ownership percentages of the noncontrolling interests.
The following table presents additional information about Level 3 assets measured at fair value on a recurring basis for 2020, 2019 and 2018, respectively:
(Dollars in thousands)Beginning
Balance
Total Net Gains (Losses) Included in Net IncomePurchases  Sales/ExitsIssuances  Distributions and Other SettlementsTransfers Out of Level 3Ending
Balance
Year ended December 31, 2020:
Non-marketable and other equity securities (fair value accounting):
Venture capital and private equity fund investments not measured at net asset value (1)
$134 $(30)$— $(104)$— $— $— $— 
Other assets:
Equity warrant assets (2)161,038 228,944 — (214,933)19,014 — (1,846)192,217 
Total assets$161,172 $228,914 $— $(215,037)$19,014 $— $(1,846)$192,217 
Year ended December 31, 2019:
Non-marketable and other equity securities (fair value accounting):
Venture capital and private equity fund investments not measured at net asset value (1)
$1,079 $12 $— $(960)$— $$— $134 
Other assets:
Equity warrant assets (2)145,199 133,910 575 (130,392)16,453 — (4,707)161,038 
Total assets$146,278 $133,922 $575 $(131,352)$16,453 $$(4,707)$161,172 
Year ended December 31, 2018:
Non-marketable and other equity securities (fair value accounting):
Venture capital and private equity fund investments not measured at net asset value (1)
$919 $457 $— $— $— $(297)$— $1,079 
Other assets:
Equity warrant assets (2)121,331 87,982 — (78,752)17,941 — (3,303)145,199 
Total assets$122,250 $88,439 $— $(78,752)$17,941 $(297)$(3,303)$146,278 
(1)Realized and unrealized gains (losses) are recorded in the line item “Gains on investment securities, net,” a component of noninterest income.
(2)Realized and unrealized gains (losses) are recorded in the line item “Gains on equity warrant assets, net,” a component of noninterest income.
The following table presents the amount of unrealized gains (losses) included in earnings (which is inclusive of noncontrolling interest) attributable to Level 3 assets still held at December 31, 2020 and 2019, respectively:
Year ended December 31,
(Dollars in thousands)20202019
Non-marketable and other equity securities (fair value accounting):
Venture capital and private equity fund investments not measured at net asset value (1)
$— $(222)
Other assets:
Equity warrant assets (2)54,417 34,691 
Total unrealized gains, net$54,417 $34,469 
Unrealized losses attributable to noncontrolling interests (1)$— $(199)
(1)Unrealized gains are recorded in the line item “Gains on investment securities, net,” a component of noninterest income.
(2)Unrealized gains are recorded in the line item “Gains on equity warrant assets, net,” a component of noninterest income.
The extent to which any unrealized gains or losses will become realized is subject to a variety of factors, including, among other things, the expiration of current sales restrictions to which these securities are subject, the actual sales of securities and the timing of such actual sales.
The following table presents quantitative information about the significant unobservable inputs used for certain of our Level 3 fair value measurements at December 31, 2020 and 2019. We have not included in this table our venture capital and private equity fund investments (fair value accounting) as we use net asset value per share (as obtained from the general partners of the investments) as a practical expedient to determine fair value.
(Dollars in thousands)Fair ValueValuation TechniqueSignificant Unobservable InputsInput RageWeighted Average
December 31, 2020:
Equity warrant assets (public portfolio)$1,036 Black-Scholes option pricing modelVolatility
46.0% - 56.8%
49.1 %
Risk-Free interest rate
0.3 - 0.9
0.6 
Sales restrictions discount (2)
10.0- 20.0
10.2 
Equity warrant assets (private portfolio)191,181 Black-Scholes option pricing modelVolatility
24.4 - 56.8
43.2 
Risk-Free interest rate
0.01 - 0.5
0.1 
Marketability discount (3)20.620.6 
Remaining life assumption (4)40.040.0 
December 31, 2019:
Venture capital and private equity fund investments (fair value accounting)
$134 Private company equity pricing(1)(1)(1)
Equity warrant assets (public portfolio)346 Black-Scholes option pricing modelVolatility
39.2% - 54.8%
50.7 %
Risk-Free interest rate1.91.9 
Sales restrictions discount (2)
10.0 - 20.0
13.6 
Equity warrant assets (private portfolio)160,692 Black-Scholes option pricing modelVolatility
23.6- 54.8
38.2 
Risk-Free interest rate
0.5 - 1.9
1.6 
Marketability discount (3)17.517.5 
Remaining life assumption (4)45.045.0 
(1)In determining the fair value of our venture capital and private equity fund investment portfolio (not measured at net asset value), we evaluate a variety of factors related to each underlying private portfolio company including, but not limited to, actual and forecasted results, cash position, recent or planned transactions and market comparable companies. Additionally, we have ongoing communication with the portfolio companies and venture capital fund managers, to determine whether there is a material change in fair value. We use company provided valuation reports, if available, to support our valuation assumptions. These factors are specific to each portfolio company and a weighted average or range of values of the unobservable inputs is not meaningful.
(2)We adjust quoted market prices of public companies, which are subject to certain sales restrictions. Sales restriction discounts generally range from 10 percent to 20 percent depending on the duration of the sales restrictions which typically range from three to six months.
(3)Our marketability discount is applied to all private company warrants to account for a general lack of liquidity due to the private nature of the associated underlying company. The quantitative measure used is based upon various option-pricing models. On a quarterly basis, a sensitivity analysis is performed on our marketability discount.
(4)We adjust the contractual remaining term of private company warrants based on our estimate of the actual remaining life, which we determine by utilizing historical data on terminations and exercises. At December 31, 2020, the weighted average contractual remaining term was 6.0 years, compared to our estimated remaining life of 2.4 years. On a quarterly basis, a sensitivity analysis is performed on our remaining life assumption.
During 2020, 2019 and 2018, we did not have any transfers between Level 3 and Level 1. All other transfers from Level 3 to Level 2 during 2020, 2019 and 2018 were due to the transfer of equity warrant assets from our private portfolio to our public portfolio (see our Level 3 reconciliation above).
Financial Instruments not Carried at Fair Value
FASB guidance over financial instruments requires that we disclose estimated fair values for our financial instruments not carried at fair value. The following fair value hierarchy table presents the estimated fair values of our financial instruments that are not carried at fair value at December 31, 2020 and 2019:
  Estimated Fair Value
(Dollars in thousands)Carrying AmountTotal
Level 1

Level 2

Level 3
December 31, 2020:
Financial assets:
Cash and cash equivalents$17,674,763 $17,674,763 $17,674,763 $— $— 
Held-to-maturity securities16,592,153 17,216,871 — 17,216,871 — 
Non-marketable securities not measured at net asset value240,761 240,761 — — 240,761 
Non-marketable securities measured at net asset value 390,658 390,658 — — — 
Net commercial loans39,886,296 40,412,490 — — 40,412,490 
Net consumer loans4,847,427 4,911,451 — — 4,911,451 
FHLB and Federal Reserve Bank stock61,232 61,232 — — 61,232 
Financial liabilities:
Short-term borrowings20,553 20,553 — 20,553 — 
Non-maturity deposits (1)101,293,346 101,293,346 101,293,346 — — 
Time deposits688,461 501,853 — 501,853 — 
3.50% Senior Notes348,348 382,855 — 382,855 — 
3.125% Senior Notes
495,280 563,840 — 563,840 — 
Off-balance sheet financial assets:
Commitments to extend credit— 36,672 — — 36,672 
December 31, 2019:
Financial assets:
Cash and cash equivalents$6,781,783 $6,781,783 $6,781,783 $— $— 
Held-to-maturity securities13,842,946 14,115,272 — 14,115,272 — 
Non-marketable securities not measured at net asset value195,405 195,405 — — 195,405 
Non-marketable securities measured at net asset value 235,351 235,351 — — — 
Net commercial loans29,104,532 29,615,176 — — 29,615,176 
Net consumer loans3,755,180 3,820,804 — — 3,820,804 
FHLB and Federal Reserve Bank stock60,258 60,258 — — 60,258 
Financial liabilities:
Short-term borrowings17,430 17,430 — 17,430 — 
Non-maturity deposits (1)61,569,714 61,569,714 61,569,714 — — 
Time deposits188,093 187,980 — 187,980 — 
3.50% Senior Notes347,987 366,856 — 366,856 — 
Off-balance sheet financial assets:
Commitments to extend credit— 27,197 — — 27,197 
(1)Includes noninterest-bearing demand deposits, interest-bearing checking accounts, money market accounts and interest-bearing sweep deposits.

Investments in Entities that Calculate Net Asset Value Per Share
FASB guidance over certain fund investments requires that we disclose the fair value of funds, significant investment strategies of the investees, redemption features of the investees, restrictions on the ability to sell investments, estimate of the period of time over which the underlying assets are expected to be liquidated by the investee, and unfunded commitments related to the investments.
Our investments in debt funds and venture capital and private equity fund investments generally cannot be redeemed. Alternatively, we expect distributions, if any, to be received primarily through IPOs and M&A activity of the
underlying assets of the fund. Subject to applicable requirements under the Volcker Rule, we do not have any plans to sell any of these fund investments. If we decide to sell these investments in the future, the investee fund’s management must approve of the buyer before the sale of the investments can be completed. The fair values of the fund investments have been estimated using the net asset value per share of the investments, adjusted for any differences between our measurement date and the date of the fund investment’s net asset value by using the most recently available financial information from the investee general partner, for example September 30th, for our December 31st consolidated financial statements, adjusted for any contributions paid, distributions received from the investment, and significant fund transactions or market events during the reporting period.
The following table is a summary of the estimated fair values of these investments and remaining unfunded commitments for each major category of these investments as of December 31, 2020:
(Dollars in thousands)Carrying AmountFair ValueUnfunded Commitments
Non-marketable securities (fair value accounting):
Venture capital and private equity fund investments (1)$273,823 $273,823 $12,709 
Non-marketable securities (equity method accounting):
Venture capital and private equity fund investments (2)362,192 362,192 10,509 
Debt funds (2)5,444 5,444 211 
Other investments (2)23,023 23,023 886 
Total$664,482 $664,482 $24,315 
(1)Venture capital and private equity fund investments within non-marketable securities (fair value accounting) include investments made by our managed funds of funds and one of our direct venture funds (consolidated VIEs) and investments in venture capital and private equity fund investments (unconsolidated VIEs). Collectively, these investments in venture capital and private equity funds are primarily in U.S. and global technology and life science/healthcare companies. Included in the fair value and unfunded commitments of fund investments under fair value accounting are $66.2 million and $3.1 million, respectively, attributable to noncontrolling interests. It is estimated that we will receive distributions from the fund investments over the next 10 to 13 years, depending on the age of the funds and any potential extensions of terms of the funds.
(2)Venture capital and private equity fund investments, debt funds and other fund investments within non-marketable securities (equity method accounting) include funds that invest in or lend money to primarily U.S. and global technology and life science/healthcare companies. It is estimated that we will receive distributions from the funds over the next 5 to 8 years, depending on the age of the funds and any potential extensions of the terms of the funds.