Accounts Receivable Factoring - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Receivables [Abstract]
Amount outstanding under accounts receivable transfer agreements without recourse	$ 80,617		$ 57,497
Total amount of accounts receivable factored without recourse	148,924	$ 133,297
Costs incurred on sale of receivables without recourse	455	487
Amount outstanding under accounts receivable transfer agreements with recourse	$ 5,217		$ 5,014
Secured debt maturity period	1 year
Total amount of accounts receivable factored with recourse	$ 7,651	6,894
Costs incurred on sale of receivables with recourse	$ 26	$ 12