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Common Stock and Stock Plans (Tables) | 12 Months Ended
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Mar. 31, 2017
Equity [Abstract] |
Summary of Stock-based Compensation Expense | Total stock-based compensation expense recognized in accordance with the authoritative guidance for share-based payments was as follows:
|  | Fiscal Years Ended |
|  | March 31, 2017 |  |  | March 31, 2016 |  |  | April 3, 2015 |
|  | (In thousands) |
Stock-based compensation expense before taxes |  | $ | 55,775 |  |  | $ | 47,510 |  |  | $ | 39,353 |
Related income tax benefits |  |  | (21,057 | ) |  |  | (18,089 | ) |  |  | (14,889 | )
Stock-based compensation expense, net of taxes |  | $ | 34,718 |  |  | $ | 29,421 |  |  | $ | 24,464 |
Summary of Employee Stock Options and Employee Stock Purchase Plan Weighted Average Assumptions | The weighted average estimated fair value of employee stock options granted and employee stock purchase plan shares issued during fiscal year 2017 was $23.62 and $16.27 per share, respectively, during fiscal year 2016 was $20.35 and $13.37 per share, respectively, and during fiscal year 2015 was $22.22 and $14.18 per share, respectively, using the Black-Scholes model with the following weighted average assumptions (annualized percentages):
|  | Employee Stock Options |  |  | Employee Stock Purchase Plan |
|  | Fiscal Year 2017 |  |  | Fiscal Year 2016 |  |  | Fiscal Year 2015 |  |  | Fiscal Year 2017 |  |  | Fiscal Year 2016 |  |  | Fiscal Year 2015 |
Volatility |  |  | 33.4 | % |  |  | 32.9 | % |  |  | 34.0 | % |  |  | 31.1 | % |  |  | 24.6 | % |  |  | 30.6 | %
Risk-free interest rate |  |  | 1.7 | % |  |  | 1.7 | % |  |  | 1.7 | % |  |  | 0.5 | % |  |  | 0.3 | % |  |  | 0.1 | %
Dividend yield |  |  | 0.0 | % |  |  | 0.0 | % |  |  | 0.0 | % |  |  | 0.0 | % |  |  | 0.0 | % |  |  | 0.0 | %
Expected life |  |  | 5.5 years |  |  |  | 5.5 years |  |  |  | 5.5 years |  |  |  | 0.5 years |  |  |  | 0.5 years |  |  |  | 0.5 years |
Summary of Employee Stock Option Activity | A summary of employee stock option activity for fiscal year 2017 is presented below:
|  | Number of Shares |  |  | Weighted Average Exercise Price per Share |  |  | Weighted Average Remaining Contractual Term in Years |  |  | Aggregate Intrinsic Value (In thousands) |
Outstanding at March 31, 2016 |  |  | 1,833,437 |  |  | $ | 54.07 |  |  |  |  |  |  |  |  |
Options granted |  |  | 463,000 |  |  |  | 70.09 |  |  |  |  |  |  |  |  |
Options canceled |  |  | (19,125 | ) |  |  | 64.66 |  |  |  |  |  |  |  |  |
Options exercised |  |  | (273,050 | ) |  |  | 44.37 |  |  |  |  |  |  |  |  |
Outstanding at March 31, 2017 |  |  | 2,004,262 |  |  | $ | 58.99 |  |  |  | 3.53 |  |  | $ | 13,283 |
Vested and exercisable at March 31, 2017 |  |  | 1,011,200 |  |  | $ | 52.19 |  |  |  | 2.31 |  |  | $ | 12,147 |
Summary of Restricted Stock Unit Activity | A summary of restricted stock unit activity for fiscal year 2017 is presented below:
|  | Number of Restricted Stock Units |  |  | Weighted Average Grant Date Fair Value per Share |
Outstanding at March 31, 2016 |  |  | 2,369,339 |  |  | $ | 59.39 |
Awarded |  |  | 1,195,961 |  |  |  | 69.99 |
Forfeited |  |  | (93,330 | ) |  |  | 66.01 |
Released |  |  | (792,616 | ) |  |  | 57.44 |
Outstanding at March 31, 2017 |  |  | 2,679,354 |  |  | $ | 64.47 |
Vested and deferred at March 31, 2017 |  |  | 148,503 |  |  | $ | 38.19 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 + Details
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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited 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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