Accounts Receivable Factoring - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Receivables [Abstract]
Amount outstanding under accounts receivable transfer agreements without recourse	$ 66,901		$ 66,901		$ 63,473
Total amount of accounts receivable factored without recourse			188,934	$ 207,432
Costs incurred on sale of receivables without recourse	391	$ 468	1,286	1,658
Amount outstanding under accounts receivable transfer agreements with recourse	6,297		$ 6,297		$ 3,433
Secured debt maturity period			1 year
Total amount of accounts receivable factored with recourse			$ 46,610	27,383
Costs incurred on sale of receivables with recourse	$ 55	$ 38	$ 185	$ 115