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Commitments and Contingencies - Guarantees and Warranties (Details) (USD $) In Thousands, unless otherwise specified | 9 Months Ended |  |  |
--- | --- | --- | --- | ---
Jan. 25, 2014 | Jan. 25, 2014 Minimum | Jan. 25, 2014 Maximum | Jan. 25, 2014 Repurchase of equipment guarantees | Apr. 27, 2013 Repurchase of equipment guarantees | Jan. 25, 2014 Performance guarantees Letter of credit and bank guarantees agreements | Jan. 25, 2014 Performance guarantees Surety bonds
Guarantees: |  |  |  |  |  |  |
Guarantees total obligations |  |  |  | $ 1,100 | $ 1,285 |  |
Performance guarantees outstanding |  |  |  |  |  | 5,815 | 13,591
Warranties: |  |  |  |  |  |  |
Standard parts warranty period |  | 1 year | 5 years |  |  |  |
Installation warranty period |  | 1 year | 10 years |  |  |  |
Movement in Standard Product Warranty Accrual |  |  |  |  |  |  |
Beginning accrued warranty costs | 25,146 |  |  |  |  |  |
Warranties issued during the period | 7,304 |  |  |  |  |  |
Settlements made during the period | (10,654) |  |  |  |  |  |
Changes in accrued warranty costs for pre-existing warranties during the period, including expirations | 3,876 |  |  |  |  |  |
Ending accrued warranty costs | $ 25,672 |  |  |  |  |  |

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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
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- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph 5 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(5)) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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