Summary of Significant Accounting Policies - Company's Accounts Receivable and Securitized Accounts Receivable (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivables	$ 2,610,824	$ 2,371,778
Less allowance for doubtful accounts	(70,890)	(59,963)	$ (46,031)	$ (32,506)
Net accounts and securitized accounts receivable	2,539,934	2,311,815
Gross domestic unsecuritized accounts receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivables	734,410	668,154
Gross domestic securitized accounts receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivables	970,973	886,000
Gross foreign receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivables	$ 905,441	$ 817,624