Accounts Receivable Factoring - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Receivables [Abstract]
Amount outstanding under accounts receivable transfer agreements without recourse	$ 120,366	$ 89,015
Total amount of accounts receivable factored without recourse	139,130	113,402
Costs incurred on sale of receivables	798	645
Amount outstanding under accounts receivable transfer agreements with recourse	9,500	15,197
Secured debt maturity period	1 year
Total amount of accounts receivable factored with recourse	15,695	22,712
Costs incurred on sale of receivables	$ 92	$ 84