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Stock-Based Compensation - (Tables)

12 Months Ended

Jan. 02, 2021

Share-based Payment Arrangement [Abstract]

Number and Weighted Average Exercise Price of Options Issued and Outstanding under All Stock Option Plans

The number and weighted-average exercise price of options issued and outstanding under all of the Company’s equity plans are as follows (in thousands, except for weighted-average exercise prices):

			Year Ended January 2, 2021												Year Ended December 28, 2019												Year Ended December 29, 2018
			Shares						Average Exercise Price						Shares						Average Exercise Price						Shares						Average Exercise Price
Options outstanding, beginning of period			5,212						$	54.23					5,676						$	43.61					6,953						$	36.26
Granted			400						187.83						545						140.56						564						98.47
Canceled/Forfeited			(219)						126.98						(158)						83.14						(233)						67.45
Exercised			(1,945)						32.41						(851)						33.32						(1,608)						27.62
Options outstanding, end of period			3,448						$	77.44					5,212						$	54.23					5,676						$	43.61
Options exercisable, end of period			2,026						$	47.31					3,311						$	33.80					3,273						$	29.63

Number and Weighted Average Exercise Price of Outstanding and Exercisable Options

The number and weighted-average exercise price of outstanding and exercisable stock options segregated by exercise price ranges (in thousands, except range of exercise prices and remaining contractual life) were as follows:

			Year Ended January 2, 2021																		Year Ended December 28, 2019
			Options Outstanding												Options Exercisable						Options Outstanding												Options Exercisable
Range of Exercise Prices			Number of Options						Average Remaining Contractual Life						Number of Options						Number of Options						Average Remaining Contractual Life						Number of Options
$15.00 to $50.00			1,696						4.14						1,518						3,464						4.14						2,958
$50.01 to $80.00			42						5.80						26						68						5.56						30
$80.01 to $120.00			910						6.83						408						1,148						6.98						320
$120.01 to $160.00			476						8.41						74						532						8.46						3
$160.01 to $200.00			255						9.17						—						—						0.00						—
$200.01 to $230.00			37						9.50						—						—						0.00						—
$230.01 to $275.00			32						9.53						—						—						0.00						—
Total			3,448						5.90						2,026						5,212						5.60						3,311

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity

The number of RSUs issued and outstanding under all of the Company’s equity plans are as follows (in thousands, except for weighted average grant date fair value amounts):

			Year Ended January 2, 2021												Year Ended December 28, 2019												Year Ended December 29, 2018
			Units						Weighted Average Grant Date Fair Value						Units						Weighted Average Grant Date Fair Value						Units						Weighted Average Grant Date Fair Value
RSUs outstanding, beginning of period			2,797						$	96.85					2,707						$	95.54					2,708						$	95.51
Granted			98						193.77						100						133.57						7						99.05
Canceled/Forfeited			(6)						165.03						(3)						133.50						—						—
Vested			(27)						134.78						(7)						99.05						(8)						88.40
RSUs outstanding, end of period			2,862						$	99.66					2,797						$	96.85					2,707						$	95.54

Schedule of Nonvested Performance-based Units Activity

The number of PSUs outstanding under all of the Company’s equity plans are as follows (in thousands, except for weighted average grant date fair value amounts):

			Year Ended January 2, 2021												Year Ended December 28, 2019												Year Ended December 29, 2018
			Units						Weighted Average Grant Date Fair Value						Units						Weighted Average Grant Date Fair Value						Units						Weighted Average Grant Date Fair Value
PSUs outstanding, beginning of period			412						$	102.22					313						$	88.34					233						$	90.70
Granted			97						179.42						128						133.50						197						86.95
Canceled/Forfeited			(7)						122.13						—						—						(86)						90.71
Vested			(58)						90.69						(29)						90.69						(31)						90.70
PSUs outstanding, end of period			444						$	120.28					412						$	102.22					313						$	88.34

Range of Assumptions Used and Resulting Weighted-Average Fair Value of Options Granted at Date of Grant

The range of assumptions used and the resulting weighted-average fair value of options granted at the date of grant were as follows:

Year Ended January 2, 2021

Year Ended December 28, 2019

Year Ended December 29, 2018

Risk-free interest rate

0.2% to 1.7%

1.4% to 2.6%

2.3% to 3.1%

Expected term

5.1 years to 5.1 years

5.1 years to 5.2 years

5.2 years to 5.6 years

Estimated volatility

26.9% to 35.5%

28.2% to 30.0%

26.8% to 32.0%

Expected dividends

0%

0%

0%

Weighted-average fair value of options granted

$51.10 per share

$42.29 per share

$31.85 per share

Total Share-Based Compensation Expense Included in Consolidated Statements of Comprehensive Income

The following table presents the total stock-based compensation expense that is included in each functional line item of the consolidated statements of operations (in thousands):

			Year Ended January 2, 2021						Year Ended December 28, 2019						Year Ended December 29, 2018
Cost of goods sold			$	714					$	445					$	334
Selling, general and administrative			31,462						30,450						21,391
Research and development			10,049						8,340						5,692
Total			$	42,225					$	39,235					$	27,417

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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Tabular disclosure of the changes in outstanding nonvested performance-based units.

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Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

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