Accounts Receivable - Company's Accounts Receivable and Securitized Accounts Receivable (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	$ 1,646,621	$ 1,274,857
Gross domestic securitized accounts receivable	713,000	614,000
Less allowance for doubtful accounts	(25,236)	(21,903)	$ (22,400)	$ (23,842)
Net accounts and securitized accounts receivable	1,621,385	1,252,954
Accounts Receivable Domestic [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	531,656	338,275
Accounts Receivable Foreign [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	$ 401,965	$ 322,582