Stockholders' Equity (Details 6) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Aug. 31, 2014	Feb. 28, 2014	Aug. 31, 2013	Mar. 02, 2013	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2013	Aug. 31, 2014 Unrealized gain (loss) on cash flow hedges	Aug. 31, 2013 Unrealized gain (loss) on cash flow hedges	Aug. 31, 2014 Unrealized gain (loss) on investment in Centaur Media	Aug. 31, 2013 Unrealized gain (loss) on investment in Centaur Media	Aug. 31, 2014 Actuarial gain on postretirement benefit plan	Aug. 31, 2013 Actuarial gain on postretirement benefit plan	Dec. 01, 2012 Actuarial gain on postretirement benefit plan
Change in accumulated other comprehensive loss, net of tax
Balance at the beginning of the period		$ (449)		$ (721)	$ (449)	$ (721)	$ (721)	$ (1,401)	$ (2,011)	$ 648	$ 1,054	$ 304	$ 236	$ 236
Other comprehensive income (loss) before reclassifications					(210)		276	(390)	624	180	(348)
Amounts reclassified	158		122		(33)	20	20	475	352	(204)	(332)	(304)
Total other comprehensive income (loss), net of tax					(243)	296	296	85	976	(24)	(680)	(304)
Balance at the end of the period	(692)		(425)		(692)	(425)	(425)	(1,316)	(1,035)	624	374		236	236
Reclassifications included in net income (loss):
Realized gain on sale of Centaur Media (gain on sale)					(321)	(509)
Termination of postretirement benefits program					(485)
Loss on cash flow hedges (interest expense)	252		193		755	559
Total reclassifications included in net income (loss)	252		193		(51)	50
Mark to market adjustment on Centaur Media for an increase (decrease) in the foreign currency exchange rate	(17)		49		45	(174)
Mark to market adjustment on Centaur Media for an increase in fair value	(209)		450		232	(361)
(Decrease) increase in fair value adjustment on Griffin's cash flow hedges	(93)		566		(619)	990
Total change in other comprehensive income (loss)	(319)		1,065		(342)	455
Other comprehensive income (loss)	(67)		1,258		(393)	505
Reclassifications included in net income (loss):
Realized gain on sale of Centaur Media (gain on sale)					117	177
Termination of postretirement benefits program tax					181
Loss on cash flow hedges (interest expense)	(94)		(71)		(280)	(207)
Total reclassifications included in net income (loss)	(94)		(71)		18	(30)
Mark to market adjustment on Centaur Media for an increase (decrease) in the foreign currency exchange rate	6		(17)		(16)	61
Mark to market adjustment on Centaur Media for an increase in fair value	73		(158)		(81)	126
(Decrease) increase in fair value adjustments on Griffin's cash flow hedges	35		(209)		229	(366)
Total change in other comprehensive income (loss)	114		(384)		132	(179)
Other comprehensive income (loss)	20		(455)		150	(209)
Reclassifications included in net income (loss):
Realized gain on sale of Centaur Media (gain on sale)					(204)	(332)
Termination of postretirement benefits program net of tax					(304)
Loss on cash flow hedges (interest expense)	158		122		475	352
Total reclassifications included in net income (loss)	158		122		(33)	20	20	475	352	(204)	(332)	(304)
Mark to market adjustment on Centaur Media for an increase (decrease) in the foreign currency exchange rate	(11)		32		29	(113)
Mark to market adjustment on Centaur Media for an increase in fair value	(136)		292		151	(235)
(Decrease) increase in fair value adjustments on Griffin's cash flow hedges	(58)		357		(390)	624
Total change in other comprehensive income (loss)	(205)		681		(210)	276
Total other comprehensive income (loss), net of tax	(47)		803		(243)	296
Cash Dividend
Cash dividend paid		$ 1,029		$ 1,028	$ 1,029	$ 1,028