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Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016
Profit Sharing Plan |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employee benefit plans, contribution cost | $ 1,317 | $ 1,195 | $ 1,027
Profit Sharing Plan | Management |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employee benefit plans, contribution cost | $ 2,913 | $ 2,382 | $ 1,915
EPSP annualized interest rate, added percentage above prime rate | 2.00% |  |
Maximum | Profit Sharing Plan | Management |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
EPSP annualized interest rate cap | 15.00% |  |
Savings Plan |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employee benefit plans, employer contribution percentage | 6.00% | 6.00% | 6.00%
Employee benefit plans, contribution cost | $ 3,405 | $ 2,676 | $ 1,945
Savings Plan | Maximum |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employee benefit plans, employer matching contribution percentage | 50.00% | 50.00% | 50.00%

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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + 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)(1) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
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- Definition Applicable margin rate. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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