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Commitments and Contingencies Commitments and Contingencies (Schedule of Future Minimum Rental Payments for Operating Leases) (Details) - USD ($)
$ in Thousands
12 Months Ended
Nov. 30, 2015
Nov. 30, 2014
Nov. 30, 2013
Operating Leased Assets [Line Items]      
2015 $ 7,552    
2016 5,805    
2017 4,924    
2018 4,316    
2019 3,417    
Thereafter 9,442    
Total Minimum Lease Payments 35,456    
Rental expense on operating leases $ 8,500 $ 7,700 $ 6,500
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