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Fair Value Measurements (Carrying Amounts and Estimated Fair Values of Financial Instruments Not Measured at Fair Value) (Detail) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Carrying Amount |  |
Assets: |  |
Cash and cash equivalents | $ 1,953,987 | $ 1,275,466
Deposits with banks | 51,119 | 45,856
Notes receivable, net | 38,204 | 29,912
Secured financings receivable | 651,048 | 748,312
Liabilities: |  |
Secured financings payable | 593,607 | 516,155
Notes and contracts payable | 1,648,863 | 1,010,756
Estimated Fair Value |  |
Assets: |  |
Cash and cash equivalents | 1,953,987 | 1,275,466
Deposits with banks | 51,235 | 45,947
Notes receivable, net | 38,686 | 30,279
Secured financings receivable | 651,048 | 748,312
Liabilities: |  |
Secured financings payable | 593,607 | 516,155
Notes and contracts payable | 1,732,520 | 1,131,356
Estimated Fair Value | Level 1 |  |
Assets: |  |
Cash and cash equivalents | 1,953,987 | 1,275,466
Deposits with banks | 8,362 | 6,092
Estimated Fair Value | Level 2 |  |
Assets: |  |
Deposits with banks | 42,873 | 39,855
Secured financings receivable | 651,048 | 748,312
Liabilities: |  |
Secured financings payable | 593,607 | 516,155
Notes and contracts payable | 1,728,170 | 1,125,128
Estimated Fair Value | Level 3 |  |
Assets: |  |
Notes receivable, net | 38,686 | 30,279
Liabilities: |  |
Notes and contracts payable | $ 4,350 | $ 6,228

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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