Commitments and Contingencies - Schedule of Future Minimum Lease Payments Under Non-Cancelable Operating Leases, Debt Principal Payment and Debt Interest Payments (Detail) - USD ($) $ in Thousands	Apr. 30, 2015	Nov. 13, 2014
Commitments and Contingencies Disclosure [Abstract]
Total	$ 52,609
2016	4,831	$ 300
2017	6,310	3,800
2018	6,081	3,800
2019	4,789	3,900
2020	4,658	4,000
Thereafter	25,940	$ 25,900
Total	57,000
2017	57,000
Thereafter	0
Total	5,456
2016	4,261
2017	1,195
Thereafter	0
Total	115,065
2016	9,092
2017	64,505
2018	6,081
2019	4,789
2020	4,658
Thereafter	$ 25,940