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Commitments and Contingencies - Guarantees and Warranties (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Jul. 28, 2018 | Jul. 29, 2017 | Jul. 28, 2018
Warranties: |  |  |
Identified warranty obligations accrued | $ 811 | $ 1,219 |
Remaining accrual | 29,953 | 27,899 | $ 29,245
Movement in Standard Product Warranty Accrual |  |  |
Beginning accrued warranty costs | 29,953 | 27,899 |
Warranties issued during the period | 2,450 | 4,128 |
Settlements made during the period | (3,969) | (3,493) |
Changes in accrued warranty costs for pre-existing warranties during the period, including expirations | 811 | 1,219 |
Ending accrued warranty costs | $ 29,245 | 29,753 |
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 |  |  | 12,703
Performance guarantees | Surety bonds |  |  |
Guarantees: |  |  |
Performance guarantees outstanding |  |  | 14,835
Out-of-Home Product Application [Member] |  |  |
Warranties: |  |  |
Identified warranty obligations accrued | $ 596 | 783 |
Remaining accrual | 1,314 |  | $ 1,314
Movement in Standard Product Warranty Accrual |  |  |
Changes in accrued warranty costs for pre-existing warranties during the period, including expirations | 596 | $ 783 |
Ending accrued warranty costs | $ 1,314 |  |

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