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Stock-Based Compensation (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 23, 2016 | Jan. 24, 2015 | Jan. 23, 2016 | Jan. 24, 2015
Stock-based compensation expense recognized for outstanding grants |  |  |  |
Equity-based awards expense | $ 1,745 | $ 1,047 | $ 6,868 | $ 6,094
Liability-based awards (income) expense | (1,645) | 3,322 | (577) | 3,695
Total stock-based compensation expense | $ 100 | $ 4,369 | $ 6,291 | $ 9,789

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