Business Segments and International Operations (Narrative) (Details) $ in Thousands	12 Months Ended
	Nov. 30, 2015 USD ($) Segments	Nov. 30, 2014 USD ($)	Nov. 30, 2013 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | Segments	3
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 54,226	$ 59,351
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	50,300	56,900	$ 53,600
Outside United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 3,900	$ 2,500	$ 3,400