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Basis of Presentation and Summary of Significant Accounting Policies - Company's Accounts Receivable and Securitized Accounts Receivable (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross accounts receivables | $ 2,153,661 | $ 2,610,824 |  |
Less allowance for credit losses | (86,886) | (70,890) | $ (59,963) | $ (46,031)
Net accounts and securitized accounts receivable | 2,066,775 | 2,539,934 |  |
Gross domestic unsecuritized accounts receivables |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross accounts receivables | 719,675 | 734,410 |  |
Gross domestic securitized accounts receivable |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross accounts receivables | 700,000 | 970,973 |  |
Gross foreign receivables |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross accounts receivables | $ 733,986 | $ 905,441 |  |

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