Accounts Receivable - Company's Accounts Receivable and Securitized Accounts Receivable (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	$ 1,455,841	$ 1,274,857
Gross domestic securitized accounts receivable	551,000	614,000
Less allowance for doubtful accounts	(24,033)	(21,903)	$ (21,969)	$ (23,842)
Net accounts and securitized accounts receivable	1,431,808	1,252,954
Accounts Receivable Domestic [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	526,502	338,275
Accounts Receivable Foreign [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	$ 378,339	$ 322,582