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Fair Value Measurements (Liabilities Measured at Fair Value Using Level 3 Inputs) (Details) - USD ($)
$ in Thousands
3 Months Ended
Feb. 29, 2016
Feb. 28, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning of period $ 0 $ 1,717
Changes in fair value of contingent consideration obligation 0 (102)
Balance, end of period $ 0 $ 1,615