Debt - Summary of Debt Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Term note payable-domestic	$ 490,000	$ 496,875
Other debt	4,291	5,565
Total notes payable and other obligations	992,784	1,137,378
Securitization facility	393,500	349,000
Total notes payable, credit agreements and Securitization Facility	1,386,284	1,486,378
Current portion	926,368	1,011,439
Long-term portion	459,916	474,939
Domestic Line of Credit [Member]
Debt Instrument [Line Items]
Revolving line of credit	355,000	425,000
Foreign Revolving Line of Credit Facility A [Member]
Debt Instrument [Line Items]
Revolving line of credit	139,793	202,839
Foreign Line of Credit [Member]
Debt Instrument [Line Items]
Revolving line of credit	3,700	7,099
Foreign Line of Credit New Zealand [Member]
Debt Instrument [Line Items]
Revolving line of credit