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CAPITAL STOCK (Tables) | 12 Months Ended
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Mar. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Stock-Based Compensation Cost | Compensation cost related to share-based transactions is recognized in the consolidated financial statements based on fair value. The total amount of share-based compensation expense, which is recorded on a straight line basis, was as follows:
(In thousands) | 2019 |  | 2018 |  | 2017
Selling, general and administrative expenses | $12,878 |  | $9,960 |  | $6,894
Research and development | 2,972 |  |  | 2,114 |  |  | 1,549 |
Cost of goods sold | 1,338 |  |  | 951 |  |  | 707 |
| $17,188 |  | $13,025 |  | $9,150
Schedule of Summary of Stock Option Activity | A summary of stock option activity for the fiscal year ended March 30, 2019 is as follows:
| Options Outstanding |  | Weighted Average Exercise Price per Share |  | Weighted Average Remaining Life (years) |  | Aggregate Intrinsic Value ($000’s)
Outstanding at March 31, 2018 | 1,197,438 |  |  | $ | 36.68 |  |  | 4.71 |  | $ | 43,685 |
Granted | 209,675 |  |  | 94.67 |  |  |  |  |  |
Exercised | (290,824 | ) |  | 35.87 |  |  |  |  |  |
Forfeited/Canceled | (102,886 | ) |  | 40.01 |  |  |  |  |  |
Outstanding at March 30, 2019 | 1,013,403 |  |  | $ | 48.55 |  |  | 4.48 |  | $ | 40,902 |
Exercisable at March 30, 2019 | 366,857 |  |  | $ | 36.63 |  |  | 3.06 |  | $ | 18,655 |
Vested or expected to vest at March 30, 2019 | 936,291 |  |  | $ | 47.16 |  |  | 4.20 |  | $ | 38,931 |
Schedule of Assumptions Utilized for Estimating Fair Value of Option Grants | The assumptions utilized for option grants during the periods presented are as follows:
| 2019 |  | 2018 |  | 2017
Volatility | 26.1 | % |  | 24.2 | % |  | 24.0 | %
Expected life (years) | 4.9 |  |  | 4.8 |  |  | 4.9 |
Risk-free interest rate | 2.8 | % |  | 1.7 | % |  | 1.2 | %
Dividend yield | 0.0 | % |  | 0.0 | % |  | 0.0 | %
Grant-date fair value per Option | $ | 26.67 |  |  | $ | 10.25 |  |  | $ | 7.61 |
Schedule of Assumptions Used, Other than Options | The weighted average rates used to determine the net periodic benefit costs and projected benefit obligations were as follows:
| 2019 |  | 2018 |  | 2017
Discount rate | 0.97 | % |  | 1.07 | % |  | 0.76 | %
Rate of increased salary levels | 1.78 | % |  | 1.73 | % |  | 1.43 | %
Expected long-term rate of return on assets | 0.75 | % |  | 0.90 | % |  | 1.10 | %
The weighted-average grant-date fair value of RSUs granted and total fair value of RSUs vested are as follows:
| 2019 |  | 2018 |  | 2017
Grant-date fair value per RSU | $ | 94.55 |  |  | $ | 41.87 |  |  | $ | 32.61 |
Fair value of RSUs vested | $ | 40.04 |  |  | $ | 33.03 |  |  | $ | 34.98 |
The assumptions used in the Monte Carlo model for PSUs granted during each fiscal year were as follows:
| 2019 |  | 2018 |  | 2017
Expected stock price volatility | 27.07 | % |  | 26.11 | % |  | 26.39 | %
Peer group stock price volatility | 34.98 | % |  | 34.13 | % |  | 33.86 | %
Correlation of returns | 47.57 | % |  | 49.51 | % |  | 51.17 | %
The weighted-average grant-date fair value of PSUs granted and total fair value of PSUs vested are as follows:
| 2019 |  | 2018 |  | 2017
Grant-date fair value per PSU | $ | 115.64 |  |  | $ | 46.49 |  |  | $ | 34.07 |
Fair value of PSUs vested | $ | 29.20 |  |  | $ | — |  |  | $ | — |
The fair values of shares purchased under the Employee Stock Purchase Plan are estimated using the Black-Scholes single option-pricing model with the following weighted average assumptions:
| 2019 |  | 2018 |  | 2017
Volatility | 30.0 | % |  | 22.6 | % |  | 31.3 | %
Expected life (months) | 6 |  |  | 6 |  |  | 6 |
Risk-free interest rate | 2.3 | % |  | 1.2 | % |  | 0.5 | %
Dividend Yield | 0.0 | % |  | 0.0 | % |  | 0.0 | %
Schedule of Summary of Restricted Stock Units Activity | A summary of RSU activity for the fiscal year ended March 30, 2019 is as follows:
| Shares |  | Weighted Average Grant Date Fair Value
Unvested at March 31, 2018 | 417,714 |  |  | $ | 38.95 |
Granted | 108,611 |  |  | 94.55 |
Vested | (150,583 | ) |  | 40.04 |
Forfeited | (66,520 | ) |  | 44.15 |
Unvested at March 30, 2019 | 309,222 |  |  | $ | 57.07 |
Schedule of Performance Share Unit awards | A summary of PSU activity for the fiscal year ended March 30, 2019 is as follows:
| Shares |  | Weighted Average Grant Date Fair Value
Unvested at March 31, 2018 | 388,107 |  |  | $ | 39.63 |
Granted | 94,460 |  |  | 115.64 |
Vested(1) | (12,352 | ) |  | 29.20 |
Forfeited | (21,559 | ) |  | 49.50 |
Unvested at March 30, 2019(2)(3) | 448,656 |  |  | $ | 54.22 |
(1) Includes the vesting of 6,176 shares that were earned in connection with awards granted in fiscal 2016 for the three-year performance cycle award period ended September 30, 2018, based on actual relative total shareholder return of 200%. (2) Includes 48,851 shares that were earned in connection with the fiscal 2018 and 2017 internal metrics awards granted to the Company's Chief Executive Officer for the performance period ended March 30, 2019, disclosed in this table at the target number of 100%. The fiscal 2018 and 2017 awards were certified by the Committee in May 2019 at 144.31% and 80.05%, respectively. (3) Includes 65,525 shares that were earned for awards granted in fiscal 2017 for the performance period ended March 30, 2019, disclosed in this table at the target number of 100%. Shares earned under this award were certified by the Committee in April 2019 based on the actual relative total shareholder return of 200%.

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- Definition Tabular disclosure of the assumptions used to determine for pension plans and/or other employee benefit plans the benefit obligation and net benefit cost, including assumed discount rates, rate increase in compensation increase, and expected long-term rates of return on plan assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of number, weighted-average exercise price or conversion ratio, aggregate intrinsic value, and weighted-average remaining contractual term for outstanding performance-based awards that are fully vested and expected to vest. Includes, but is not limited to, unvested awards for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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