Benefit Plans - Pension Liability Recognized on Balance Sheet (Detail) - USD ($) $ in Thousands	Nov. 30, 2016	Nov. 30, 2015
U.S Pension Plan [Member]
Consolidated statements of financial condition:
Liabilities	$ 8,739	$ 11,299
Accumulated other comprehensive income, before taxes:
Net losses	(5,901)	(5,255)
German Pension Plan [Member]
Consolidated statements of financial condition:
Liabilities	24,166	23,545
Accumulated other comprehensive income, before taxes:
Net losses	$ (5,748)	$ (4,917)