Benefit Plans - Additional Information (Detail) - USD ($)	9 Months Ended
	Aug. 31, 2015	Nov. 30, 2014
U.S Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions made to pension plan	$ 0
Contributions expected to be made to pension plan	0
German Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Investment in insurance contract	15,500,000	$ 18,100,000
Contributions made to pension plan	0
Contributions expected to be made to pension plan	$ 0