Benefit Plans - Pension Liability Recognized on Balance Sheet (Detail) - USD ($) $ in Thousands	Nov. 30, 2017	Nov. 30, 2016
U.S. Pension Plan
Consolidated statements of financial condition:
Liabilities	$ 7,610	$ 8,739
Accumulated other comprehensive income, before taxes:
Net losses	(6,092)	(5,901)
German Pension Plan
Consolidated statements of financial condition:
Liabilities	26,244	24,166
Accumulated other comprehensive income, before taxes:
Net losses	$ (5,305)	$ (5,748)