Earnings Per Share (Calculation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2016	May 31, 2015
Earnings Per Share [Abstract]
Net (loss) income (in dollars)	$ 7,275	$ 5,769	$ 10,491	$ 4,798
Weighted average shares outstanding (in shares)	49,873	50,342	50,341	50,505
Dilutive impact from common stock equivalents (in shares)	481	743	556	719
Diluted weighted average shares outstanding (in shares)	50,354	51,085	50,897	51,224
Basic earnings (loss) per share (in dollars per share)	$ 0.15	$ 0.11	$ 0.21	$ 0.10
Diluted earnings (loss) per share (in dollars per share)	$ 0.14	$ 0.11	$ 0.21	$ 0.09