Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	May 31, 2016	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2014	Nov. 30, 2013
Operating Loss Carryforwards [Line Items]
Income tax expense (benefit)		$ 20,446	$ 21,155	$ 28,346
Decrease in valuation allowance		5,000	1,500	3,300
Cumulative undistributed foreign earnings		13,700
Unrecognized tax benefits		7,046	4,779	$ 1,711	$ 1,022
Deferred tax assets related to operating loss carryforwards, not recorded		3,200
Accrued estimated interest and penalties		300	$ 400
2030 Expiration [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards		107,300
Indefinite-Lived Carryforwards [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards		800
Tax credit carryforwards		2,100
Operating Loss Carryforwards Expiring Through 2022 [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards		5,200
2031 Expiration [Member]
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards		3,500
Other Noncurrent Liabilities [Member]
Operating Loss Carryforwards [Line Items]
Unrecognized tax benefits		$ 3,800
Out of Period Tax Adjustment [Member]
Operating Loss Carryforwards [Line Items]
Income tax expense (benefit)	$ (2,700)