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Share-Based Compensation (Tables) | 9 Months Ended
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Dec. 27, 2014
Option Activity and Information about Options Outstanding | The following table summarizes the share option activity during the nine months ended December 27, 2014, and information about options outstanding at December 27, 2014:
|  | Number of Options |  |  | Weighted Average Exercise price |  |  | Weighted Average Remaining Contractual Life (years) |  |  | Aggregate Intrinsic Value (in thousands) |
Outstanding at March 29, 2014 |  |  | 8,377,928 |  |  | $ | 13.69 |  |  |  |  |  |  |  |  |
Granted |  |  | 795,255 |  |  | $ | 90.95 |  |  |  |  |  |  |  |  |
Exercised |  |  | (1,462,107 | ) |  | $ | 6.88 |  |  |  |  |  |  |  |  |
Canceled/forfeited |  |  | (177,845 | ) |  | $ | 29.14 |  |  |  |  |  |  |  |  |
Outstanding at December 27, 2014 |  |  | 7,533,231 |  |  | $ | 22.79 |  |  |  | 5.59 |  |  | $ | 407,380 |
Vested or expected to vest at December 27, 2014 |  |  | 7,382,566 |  |  | $ | 22.79 |  |  |  | 5.59 |  |  |  |  |
Vested and exercisable at December 27, 2014 |  |  | 3,504,844 |  |  | $ | 11.92 |  |  |  | 5.17 |  |  | $ | 221,824 |
Assumptions Used to Estimate Fair Value of Options | The following table represents assumptions used to estimate the fair value of options:
|  | Three Months Ended |  |  | Nine Months Ended |
|  | December 27, 2014 |  |  | December 28, 2013 |  |  | December 27, 2014 |  |  | December 28, 2013 |
Expected dividend yield |  |  | 0.0 | % |  |  | 0.0 | % |  |  | 0.0 | % |  |  | 0.0 | %
Volatility factor |  |  | 32.8 | % |  |  | 38.4 | % |  |  | 33.2 | % |  |  | 46.1 | %
Weighted average risk-free interest rate |  |  | 1.5 | % |  |  | 1.3 | % |  |  | 1.5 | % |  |  | 1.0 | %
Expected life of option |  |  | 4.75 years |  |  |  | 4.75 years |  |  |  | 4.75 years |  |  |  | 4.75 years |
Restricted Shares and Restricted Share Units | The following table summarizes restricted shares under the 2012 Plan as of December 27, 2014 and changes during the fiscal period then ended:
|  | Number of Unvested Restricted Shares |  |  | Weighted Average Grant Date Fair Value |
Unvested at March 29, 2014 |  |  | 657,853 |  |  | $ | 38.38 |
Granted |  |  | 433,126 |  |  | $ | 90.57 |
Vested |  |  | (212,853 | ) |  | $ | 32.12 |
Canceled/forfeited |  |  | (29,734 | ) |  | $ | 68.37 |
Unvested at December 27, 2014 |  |  | 848,392 |  |  | $ | 65.68 |
The following table summarizes restricted share units under the 2012 Plan as of December 27, 2014 and changes during the fiscal period then ended:
|  | Number of Unvested Restricted Units |  |  | Weighted Average Grant Date Fair Value |
Unvested at March 29, 2014 |  |  | 199,779 |  |  | $ | 58.31 |
Granted |  |  | 245,591 |  |  | $ | 81.61 |
Vested |  |  | (11,770 | ) |  | $ | 30.04 |
Canceled/forfeited |  |  | (10,846 | ) |  | $ | 62.24 |
Unvested at December 27, 2014 |  |  | 422,754 |  |  | $ | 73.25 |

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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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