Benefit Plans - Components of Net Periodic Pension Cost (Details) - United States - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 500	$ 400	$ 450
Interest cost on projected benefit obligation	2,303	2,129	2,232
Expected return on plan assets	(3,008)	(3,247)	(3,021)
Net amortization	122	0	19
Settlement losses	0	365	0
Net periodic pension cost	$ (83)	$ (353)	$ (320)