Stockholders' Equity - Accumulated Other Comprehensive Income Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016
Change in accumulated other comprehensive loss, net of tax
Balance at beginning of period			$ 90,803	$ 94,809
Other comprehensive (loss) income before reclassifications	$ (730)	$ (964)	(1,163)	(2,418)
Reclassifications included in net income (loss)	37	219	464	646
Total other comprehensive loss, net of tax	(693)	(745)	(699)	(1,772)
Balance at end of period	94,007	90,508	94,007	90,508
Accumulated Other Comprehensive Loss
Change in accumulated other comprehensive loss, net of tax
Balance at beginning of period			(1,049)	(1,085)
Other comprehensive (loss) income before reclassifications			(1,163)	(2,418)
Reclassifications included in net income (loss)			464	646
Total other comprehensive loss, net of tax	(693)	(745)	(699)	(1,772)
Balance at end of period	(1,748)	(2,857)	(1,748)	(2,857)
Unrealized Gain (Loss) on Cash Flow Hedges
Change in accumulated other comprehensive loss, net of tax
Balance at beginning of period			(1,062)	(1,744)
Other comprehensive (loss) income before reclassifications	(697)	(710)	(1,322)	(1,825)
Reclassifications included in net income (loss)			636	646
Total other comprehensive loss, net of tax			(686)	(1,179)
Balance at end of period	$ (1,748)	(2,923)	(1,748)	(2,923)
Unrealized Gain (Loss) on Investment in Centaur Media
Change in accumulated other comprehensive loss, net of tax
Balance at beginning of period			13	659
Other comprehensive (loss) income before reclassifications			159	(593)
Reclassifications included in net income (loss)			(172)
Total other comprehensive loss, net of tax			$ (13)	(593)
Balance at end of period		$ 66		$ 66