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Commitments and Contingencies - Guarantees and Warranties (Details) $ in Thousands | 6 Months Ended
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Oct. 31, 2015 USD ($)
Movement in Standard Product Warranty Accrual |
Beginning accrued warranty costs | $ 26,481
Warranties issued during the period | 7,009
Settlements made during the period | (9,540)
Changes in accrued warranty costs for pre-existing warranties during the period, including expirations | 4,514
Ending accrued warranty costs | $ 28,464
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 | $ 13,035
Performance guarantees | Surety bonds |
Guarantees: |
Performance guarantees outstanding | 68,615
Out-of-Home Product Application [Member] |
Movement in Standard Product Warranty Accrual |
Changes in accrued warranty costs for pre-existing warranties during the period, including expirations | $ 3,180

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