Pensions and Postretirement Benefits (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		0 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2014 United States Postretirement Benefit Plan of US Entity [Member]	Aug. 31, 2013 United States Postretirement Benefit Plan of US Entity [Member]	Aug. 31, 2014 United States Postretirement Benefit Plan of US Entity [Member]	Aug. 31, 2013 United States Postretirement Benefit Plan of US Entity [Member]	Sep. 15, 2014 Subsequent Event [Member]
Defined Benefit Plan Disclosure [Line Items]
Service costs incurred	$ 1,516,000	$ 2,606,000	$ 7,609,000	$ 7,812,000	$ 4,000	$ 6,000	$ 12,000	$ 17,000
Interest costs on projected benefit obligation	2,117,000	1,766,000	6,358,000	5,227,000	103,000	100,000	309,000	300,000
Expected return on plan assets	(2,088,000)	(1,900,000)	(6,312,000)	(5,624,000)
Amortization of prior service credit	(114,000)	(336,000)	(790,000)	(1,008,000)
Amortization of transitional obligation	11,000	0	33,000	0
Curtailment gain	(2,877,000)	0	(2,877,000)	0
Net periodic pension expense (income)	(1,435,000)	2,136,000	4,021,000	6,407,000	107,000	106,000	321,000	317,000
Pension contribution									$ 10,000,000