Business Segments and International Operations (Narrative) (Details) $ in Thousands	12 Months Ended
	Nov. 30, 2016 USD ($) Segments	Nov. 30, 2015 USD ($)	Nov. 30, 2014 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | Segments	3
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 50,105	$ 54,226
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	45,400	50,300	$ 56,900
Outside United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 4,700	$ 3,900	$ 2,500