Fair Value Measurements (Liabilities Measured at Fair Value Using Level 3 Inputs) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	$ 1,615	$ 393	$ 1,717	$ 388
Incurrence of contingent purchase price liability	0	1,450	0	1,450
Payments of contingent consideration	0	(210)	0	(210)
Changes in fair value of contingent consideration obligation	(1,111)	16	(1,213)	21
Transfer to Level 2 fair value measurement	(209)	0	(209)	0
Balance, end of period	$ 295	$ 1,649	$ 295	$ 1,649