Securities	9 Months Ended
Jan. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Securities	Securities On October 25, 2013, we invested in three time deposits with total principal of $110,000 Canadian. On October 24, 2014, time deposits with a principal value of $45,000 Canadian matured with a value of $45,436 Canadian. The remaining time deposits with a principal value of $65,000 Canadian matured on October 28, 2015 with a value of $67,031 Canadian. Our time deposit securities were classified as held-to-maturity securities as of April 25, 2015, as we had both the intent and ability to hold them until maturity. As of April 25, 2015, these securities had a carrying value of $53,372 and were recorded in the condensed consolidated balance sheet as short-term investments. They were carried at cost, adjusted for accrued interest and amortization. The carrying value was not materially different than fair value. The fair value was determined based on a discounted cash flow analysis using unobservable inputs (i.e. level 3 inputs), which included a forward yield curve, the estimated timing of payments and the credit quality of the underlying creditor. Significant changes in any of the significant unobservable inputs in isolation would not have resulted in a materially lower fair value estimate. The interrelationship between these inputs was insignificant.

Securities

9 Months Ended

Jan. 30, 2016

Investments, Debt and Equity Securities [Abstract]

On October 25, 2013, we invested in three time deposits with total principal of $110,000 Canadian. On October 24, 2014, time deposits with a principal value of $45,000 Canadian matured with a value of $45,436 Canadian. The remaining time deposits with a principal value of $65,000 Canadian matured on October 28, 2015 with a value of $67,031 Canadian. Our time deposit securities were classified as held-to-maturity securities as of April 25, 2015, as we had both the intent and ability to hold them until maturity. As of April 25, 2015, these securities had a carrying value of $53,372 and were recorded in the condensed consolidated balance sheet as short-term investments. They were carried at cost, adjusted for accrued interest and amortization. The carrying value was not materially different than fair value. The fair value was determined based on a discounted cash flow analysis using unobservable inputs (i.e. level 3 inputs), which included a forward yield curve, the estimated timing of payments and the credit quality of the underlying creditor. Significant changes in any of the significant unobservable inputs in isolation would not have resulted in a materially lower fair value estimate. The interrelationship between these inputs was insignificant.