Schedule II - Valuation and Qualifying Accounts (Details) - Allowance for Doubtful Accounts - USD ($) $ in Thousands		12 Months Ended
		Nov. 30, 2015	Nov. 30, 2014	Nov. 30, 2013
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance beginning of period		$ 1,000	$ 1,000	$ 1,000
Additions charged to costs and expenses		260	101	382
Deductions (A)	[1]	260	101	382
Balance at end of period		$ 1,000	$ 1,000	$ 1,000

[1] Uncollectible accounts written off, net of recoveries.