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Stock-Based Compensation - Additional Information (Detail) - USD ($) | 12 Months Ended
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Jan. 01, 2021 | Jan. 03, 2020 | Dec. 28, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value |  | $ 31,300,000 | $ 25,600,000 | $ 23,200,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value |  | $ 68.21 | $ 57.08 | $ 40.61
Share Based Compensation Arrangement By Share Based Payment Award Options Expiration Term |  | 10 years |  |
Total intrinsic value of options exercised |  | $ 18,211,000 | $ 9,651,000 | $ 0
Weighted average fair value of options granted |  | $ 19.73 | $ 15.16 | $ 10.59
Maximum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Percentage of annual bonus settled with fully vested restricted stock unit awards |  | 40.00% |  |
2008 Equity Incentive Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total number of shares reserved for issuance |  | 11,856,300 |  |
Number of Shares Available for Grant |  | 1,817,364 |  |
Employee Stock Purchase Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total number of shares reserved for issuance |  | 1,200,000 |  |
Number of Shares Available for Grant |  | 362,171 |  |
Weighted average purchase price |  | $ 73.22 | $ 60.32 | $ 45.26
Purchase Price Of Common Stock As a Percentage of Fair Market Value |  | 95.00% |  |
Employee Stock Purchase Plan | Maximum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Maximum Percentage Of Payroll Deductions Related To Purchase Of Common Stock |  | 15.00% |  |
Vested Restricted Stock Awards |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock based compensation, holding period |  | 4 years |  |
Stock based compensation expense |  | $ 8,112,000 | $ 8,756,000 | $ 8,443,000
Unvested Restricted Stock [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock based compensation, vesting period |  | 4 years |  |
Stock based compensation expense |  | $ 8,472,000 | 8,127,000 | 7,653,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | [1] | $ 68.21 |  |
Unrecognized compensation cost |  | $ 10,485,000 |  |
Weighted average period of recognized term |  | 2 years 6 months |  |
Unvested Restricted Stock [Member] | Minimum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Recipient age to expense award on grant date |  | 59 years 6 months |  |
Employee Stock Option |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock based compensation, vesting period |  | 4 years |  |
Stock based compensation expense |  | $ 694,000 | $ 583,000 | $ 897,000
Unrecognized compensation cost |  | $ 1,202,000 |  |
Weighted average period of recognized term |  | 2 years 6 months |  |
[1] | Does not include employee stock purchase plans or stock option plans.

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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + 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 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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