Summary of Significant Accounting Policies - Company's Accounts Receivable and Securitized Accounts Receivable (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross domestic securitized accounts receivable	$ 614,000	$ 675,000
Accounts Receivable, Gross	1,274,857	1,372,639
Less allowance for doubtful accounts	(21,903)	(23,842)	$ (22,416)	$ (19,463)
Net accounts and securitized accounts receivable	1,252,954	1,348,797
Accounts Receivable Domestic [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Gross	338,275	330,466
Accounts Receivable Foreign [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Gross	$ 322,582	$ 367,173