Subsequent Events - Additional Information (Detail) - Line of Credit - USD ($)	1 Months Ended	12 Months Ended
	Jan. 31, 2017	Oct. 30, 2016	Jul. 01, 2016	Jul. 31, 2015
Subsequent Event [Line Items]
Cash collateral for borrowed securities		$ 35,000,000.0	$ 50,000,000.0	$ 20,000,000.0
Unbilled receivable percent		15.00%
Subsequent Event
Subsequent Event [Line Items]
Cash collateral for borrowed securities	$ 20,000,000.0
Unbilled receivable percent	10.00%
Maximum quarterly distribution if liquidity requirement is met	$ 500,000.0
Covenant compliance, EBIT minimum to pay dividends	40,000,000
Maximum | Subsequent Event
Subsequent Event [Line Items]
Supply chain finance receivable	5,000,000
Sale of Maintech or Receipt of IRS Refund | Subsequent Event
Subsequent Event [Line Items]
Cash collateral for borrowed securities, contingent maximum	25,000,000.0
Dividend Payment or Stock Repurchase | Subsequent Event
Subsequent Event [Line Items]
Cash collateral for borrowed securities, contingent maximum	$ 35,000,000.0