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Share-Based Payment Arrangements - Additional Information (Detail) |  | 12 Months Ended
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Apr. 24, 2018 shares | Dec. 29, 2018 USD ($) EquityPlan shares | Dec. 30, 2017 USD ($) shares | Dec. 31, 2016 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of employee equity incentive plans | EquityPlan |  | 2 |  |
Income tax benefit realized on disqualifying dispositions of stock acquired by exercise of incentive stock options |  | $ 84,000 | $ 339,000 |
Accounting Standards Update 2016-09 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Excess tax benefit from stock-based awards |  | $ 2,060,000 | $ 1,299,000 |
Restricted Stock Units (RSUs) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Discount rate on stock awards |  | 7.00% |  |
Stock awards granted, shares | shares | 9,324 | 65,824 | 67,913 | 79,948
Recognized share-based compensation expense |  | $ 15,985,000 | $ 5,849,000 | $ 849,000
Unrecognized compensation cost expected to be recognized over period, years |  | 3 years 3 months 18 days |  |
Restricted Stock Units (RSUs) | February 2018 Grant |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Percentage of target available for common share issuance |  | 100.00% |  |
Restricted Stock Units (RSUs) | February 2017 Grant |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Percentage of target available for common share issuance |  | 100.00% |  |
Restricted Stock Units (RSUs) | January 2016 Grant |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Percentage of target available for common share issuance |  | 100.00% |  |
Restricted Stock Units (RSUs) | January 2015 Grant |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Percentage of target available for common share issuance |  | 100.00% |  |
Restricted Stock Units (RSUs) | April 2018 Grant |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Maximum percentage of target available for common share issuance | 150.00% |  |  |
Non Vested Restricted Stock and Deferred Stock Units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock awards granted, shares | shares |  | 22,803 | 42,573 | 26,033
Unrecognized compensation cost, other than options |  | $ 3,184,000 |  |
Unrecognized compensation cost expected to be recognized over period, years |  | 2 years 2 months 12 days |  |
Directors Stock Compensation Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
FMV of restricted shares granted to Directors upon election |  | $ 110,000 | $ 110,000 | $ 110,000
Restricted shares granted | shares |  | 4,950 | 6,575 | 7,762
Compensation cost on restricted and Deferred Stock Units granted |  | $ 660,000 | $ 651,000 | $ 591,000
Directors Stock Compensation Plan | Class III Director |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
FMV of restricted shares granted to Directors upon election |  | 0 | 0 | 35,000
Employee Stock Option |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock options outstanding, intrinsic value |  | 3,989,000 |  |
Intrinsic value of stock options exercisable |  | 3,952,000 |  |
Total intrinsic value of stock options exercised during periods |  | 6,715,000 | $ 7,599,000 | $ 7,427,000
Unrecognized compensation cost, stock options |  | $ 0 |  |
Deferred Stock Units D S Us [Member] | Director [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock awards granted, shares | shares |  | 990 | 1,315 |
Maximum | Restricted Stock Units (RSUs) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unrecognized compensation cost, other than options |  | $ 18,500,000 |  |
Maximum | Restricted Stock Units (RSUs) | February 2017 Grant |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Maximum percentage of target available for common share issuance |  | 200.00% |  |
Maximum | Restricted Stock Units (RSUs) | January 2016 Grant |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Maximum percentage of target available for common share issuance |  | 200.00% |  |
Maximum | Restricted Stock Units (RSUs) | January 2015 Grant |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Maximum percentage of target available for common share issuance |  | 200.00% |  |
Maximum | Restricted Stock Units (RSUs) | Prior to 2015 grant |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Maximum percentage of target available for common share issuance |  | 100.00% |  |
2011 Equity Incentive Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Common stock authorized for issuance | shares |  | 6,000,000 |  |
Common stock reserved for issuance | shares |  | 4,436,874 |  |
2013 Directors Stock Compensation Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Common stock authorized for issuance | shares |  | 115,000 |  |
Common stock reserved for issuance | shares |  | 72,742 |  |
2013 Directors Stock Compensation Plan | Deferred Stock Unit |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock vesting percentage |  | 100.00% |  |

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- Definition The number of grants made 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=109197908&loc=d3e5070-113901 + Details
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- Definition Restrictions on equity-based instruments during the vesting period, such as the inability to transfer unvested awards, are not taken into account in estimating the fair value of the award. However, restrictions that remain in effect after an award is vested, such as the inability to transfer or hedge vested options or a prohibition on the sale of outstanding vested shares (or other type of equity) for a period of time, affect the estimate of an award's 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 (f)(2)(v) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + 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 (a)(3) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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