Benefit Plans - Pension Liability Recognized on Balance Sheet (Detail) - USD ($) $ in Thousands	Nov. 30, 2015	Nov. 30, 2014
U.S Pension Plan [Member]
Consolidated statements of financial condition:
Liabilities	$ (11,299)	$ (4,177)
Accumulated other comprehensive income (loss), before taxes:
Net gain (loss)	(5,255)	2,390
German Pension Plan [Member]
Consolidated statements of financial condition:
Liabilities	23,545	28,434
Accumulated other comprehensive income (loss), before taxes:
Net gain (loss)	$ (4,917)	$ (5,281)