|**Accrued Liabilities (Tables)**                     | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|---------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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|**Payables and Accruals [Abstract]**                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|Schedule of accounts payable and accrued liabilities | Accrued liabilities atAugust 27, 2016andNovember 28, 2015were as follows:August 27, 2016November 28, 2015Accrued salaries, wages and commissions$16,507$16,498Compensated absences9,0898,672Accrued insurance liabilities8,0309,928Warranties6,0887,870Customer deposits18,16725,036Other accrued liabilities26,65138,406Accrued liabilities$84,532$106,410                                                                                                                                      
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|                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|                                                     | August 27, 2016                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|Accrued salaries, wages and commissions              | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|Compensated absences                                 | 9,089                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|Accrued insurance liabilities                        | 8,030                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|Warranties                                           | 6,088                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|Customer deposits                                    | 18,167                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|Other accrued liabilities                            | 26,651                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|Accrued liabilities                                  | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|Schedule of product warranty liability               | Changes in the Company’s warranty accrual are as follows:Nine Months EndedAugust 27, 2016August 29, 2015Warranty accrual at beginning of period$7,870$9,405Warranty accrual added through business acquisitions—100Accruals for warranties issued during the period1,3391,570Adjustments related to pre-existing warranties(1,440)(1,499)Settlements made during the period(1,450)(1,378)Other adjustments, including currency translation(231)(450)Warranty accrual at end of period$6,088$7,748
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|                                                     | Nine Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|                                                     | August 27, 2016                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|Warranty accrual at beginning of period              | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|Warranty accrual added through business acquisitions | —                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|Accruals for warranties issued during the period     | 1,339                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|Adjustments related to pre-existing warranties       | (1,440                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|Settlements made during the period                   | (1,450                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|Other adjustments, including currency translation    | (231                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|Warranty accrual at end of period                    | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

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