Sale of Non-United States Accounts Receivable - Additional Information (Detail)				0 Months Ended
	Apr. 30, 2015 USD ($)	Apr. 30, 2015 Singapore RPA [Member] USD ($)	Apr. 30, 2015 Singapore RPA [Member] SGD	Apr. 20, 2015 European RPA [Member]	Apr. 30, 2015 European RPA [Member] USD ($)	Apr. 30, 2015 European RPA [Member] EUR (€)
Finance Receivable Transferred To Held For Sale [Line Items]
Financing receivable maximum amount under receivable purchase agreement		$ 11,300,000	15,000,000		$ 108,900,000	€ 100,000,000
Extended purchase agreement term				2 years
Receivables held by third party	$ 0