Stockholders' Equity - Accumulated Other Comprehensive Income Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2018	Aug. 31, 2017
Change in accumulated other comprehensive loss, net of tax
Balance at the beginning of the year			$ (284)
Other comprehensive income before reclassifications	$ 132	$ (730)	2,088	$ (1,163)
Reclassifications included in net (loss) income	97	37	435	464
Balance at the end of the year	2,203		2,203
Unrealized Gain (Loss) on Cash Flow Hedges
Change in accumulated other comprehensive loss, net of tax
Balance at the beginning of the year			(284)	(1,062)
Other comprehensive income before reclassifications	132	(697)	2,088	(1,322)
Reclassifications included in net (loss) income			435	636
Adoption of ASU 2018-02 - reclassification to retained	(36)		(36)
Net activity for other comprehensive income			2,487	(686)
Balance at the end of the year	2,203	(1,748)	2,203	(1,748)
Unrealized Gain (Loss) on Investment in Centaur Media
Change in accumulated other comprehensive loss, net of tax
Balance at the beginning of the year				13
Other comprehensive income before reclassifications				159
Reclassifications included in net (loss) income				(172)
Net activity for other comprehensive income				(13)
Accumulated Other Comprehensive Loss
Change in accumulated other comprehensive loss, net of tax
Balance at the beginning of the year			(284)	(1,049)
Other comprehensive income before reclassifications			2,088	(1,163)
Reclassifications included in net (loss) income			435	464
Adoption of ASU 2018-02 - reclassification to retained	(36)		(36)
Net activity for other comprehensive income			2,487	(699)
Balance at the end of the year	$ 2,203	$ (1,748)	$ 2,203	$ (1,748)