Pension Plan - Additional Information (Detail) (USD $)	1 Months Ended	6 Months Ended		1 Months Ended	12 Months Ended
	Jul. 31, 2012	Aug. 31, 2014	Feb. 28, 2015 Scenario, Forecast [Member]	Jul. 31, 2012 Predecessor [Member]	Feb. 28, 2015 Minimum [Member] Scenario, Forecast [Member]	Feb. 28, 2015 Maximum [Member] Scenario, Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Employees covered under noncontributory Pension Plan		8.00%
Compensation period preceding retirement and termination		5 years
Minimum required contribution to the plan is approximately			$ 0
Company expect to make cash contribution to the plan		$ 3,000,000			$ 2,000,000	$ 3,000,000
Number of years used for calculating Pension Plan liability	25 years			24 months