Benefit Plans - Components of Net Periodic Pension (Benefit) Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
U.S Pension Plan [Member]
Components of net periodic pension (income) cost:
Service cost	$ 63	$ 56	$ 126	$ 112
Interest cost on projected benefit obligation	585	607	1,170	1,214
Expected return on plan assets	(848)	(789)	(1,696)	(1,578)
Net amortization	0	(36)	0	(72)
Net periodic pension income	(200)	(162)	(400)	(324)
German Pension Plan [Member]
Components of net periodic pension (income) cost:
Service cost	0	11	0	22
Interest cost on projected benefit obligation	127	221	263	442
Net amortization	79	63	163	125
Net periodic pension income	$ 206	$ 295	$ 426	$ 589