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Commitments and Contingencies (Schedule of Future Minimum Rental Payments for Operating Leases) (Details) - USD ($)
$ in Thousands
12 Months Ended
Nov. 30, 2016
Nov. 30, 2015
Nov. 30, 2014
Operating Leased Assets [Line Items]      
2015 $ 7,660    
2016 7,218    
2017 6,653    
2018 4,354    
2019 2,592    
Thereafter 7,644    
Total Minimum Lease Payments 36,121    
Rental expense on operating leases $ 7,500 $ 8,500 $ 7,700
Minimum      
Operating Leased Assets [Line Items]      
Noncancelable operating leases, term 3 years    
Maximum      
Operating Leased Assets [Line Items]      
Noncancelable operating leases, term 5 years    
Noncancelable operating leases, renewal term 5 years