Postretirement Benefits (Net Periodic Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2020
Retirement Benefits [Abstract]
Interest cost	$ 1,853	$ 1,593	$ 1,950
Amortization of prior service cost	0	85	425
Service cost	1,132	1,152	1,077
Amortization of net actuarial loss	998	1,443	912
Total	$ 3,983	$ 4,273	$ 4,364