Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2014
Dividends declared, per share (in dollars per share)	$ 0.30	$ 0.30	$ 0.20
Exercise of employee stock options, reversal of tax benefit on exercised stock options	$ 17	$ 9	$ 4
Additional Paid-in Capital
Exercise of employee stock options, reversal of tax benefit on exercised stock options	$ 17