Benefit Plans - Additional Information (Detail) (USD $)	6 Months Ended
	May 31, 2014	Nov. 30, 2013
German Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Investment in insurance contract	$ 19,200,000	$ 19,700,000
Contributions made to pension plan	0
German Pension Plan [Member] | November 30, 2014 [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions expected to be made to pension plan	0
U.S. Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions made to pension plan	0
U.S. Pension Plan [Member] | November 30, 2014 [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions expected to be made to pension plan	$ 1,000,000