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Commitments and Contingencies - Guarantees and Warranties (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Jan. 30, 2016
May. 02, 2015
Jan. 30, 2016
Warranties:      
Identified warranty obligations accrued $ 7,692    
Remaining accrual 26,481 $ 26,481 $ 29,100
Movement in Standard Product Warranty Accrual      
Beginning accrued warranty costs 26,481    
Warranties issued during the period 8,696    
Settlements made during the period (13,769)    
Changes in accrued warranty costs for pre-existing warranties during the period, including expirations 7,692    
Ending accrued warranty costs $ 29,100 26,481  
Minimum      
Warranties:      
Standard parts warranty period 1 year    
Installation warranty period 1 year    
Maximum      
Warranties:      
Standard parts warranty period 5 years    
Installation warranty period 10 years    
Performance guarantees | Letter of credit and bank guarantees agreements      
Guarantees:      
Performance guarantees outstanding     8,183
Performance guarantees | Surety bonds      
Guarantees:      
Performance guarantees outstanding     64,302
Out-of-Home Product Application      
Warranties:      
Identified warranty obligations accrued $ 5,600 1,200  
Remaining accrual 3,500   $ 3,500
Movement in Standard Product Warranty Accrual      
Changes in accrued warranty costs for pre-existing warranties during the period, including expirations 5,600 $ 1,200  
Ending accrued warranty costs $ 3,500