Benefit Plans - Components of Net Periodic Pension (Benefit) Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2016	Aug. 31, 2015
U.S Pension Plan [Member]
Components of net periodic pension cost (income):
Service cost	$ 100	$ 63	$ 300	$ 189
Interest cost on projected benefit obligation	587	585	1,761	1,755
Expected return on plan assets	(730)	(848)	(2,190)	(2,544)
Net periodic pension income	(43)	(200)	(129)	(600)
German Pension Plan [Member]
Components of net periodic pension cost (income):
Interest cost on projected benefit obligation	133	132	398	395
Net amortization	83	82	246	245
Net periodic pension income	$ 216	$ 214	$ 644	$ 640