Benefit Plans - Pension Liability Recognized on Balance Sheet (Details) - United States - USD ($) $ in Thousands	Nov. 30, 2019	Nov. 30, 2018
Consolidated statements of financial condition:
Accrued expenses and other liabilities	$ 6,242	$ 6,548
Accumulated other comprehensive income, before taxes:
Net losses	$ (8,159)	$ (6,382)

Amount of liability, recognized in statement of financial position, for defined benefit pension plan. Excludes other postretirement benefit plan.

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