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Stock-Based Compensation - Narrative (Details) - USD ($) $ in Thousands |  | 3 Months Ended
--- | --- | ---
Mar. 01, 2019 | Mar. 30, 2019 | Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation expense |  | $ 1,553 | $ 1,464
Unrecognized compensation expense related to stock awards |  | $ 9,388 |
Recognition period |  | 2 years |
Executive Officer | Performance Based Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of units granted (in shares) | 27,422 |  |
Aggregate grant date fair value | $ 2,364 |  |
Actual adjusted EBITDA, forfeiture threshold |  | 50.00% |
Percentage of target award expected to vest |  | 100.00% |
Executive Officers And Employees | Time Based Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of units granted (in shares) | 39,206 |  |
Aggregate grant date fair value | $ 3,385 |  |
Share-Based Compensation Award, Performance Metric, Actual Adjusted EBITDA Between 50 Percent And 100 Percent | Executive Officer | Performance Based Restricted Stock Units | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of adjustment of award amount |  | 50.00% |
Share-Based Compensation Award, Performance Metric, Actual Adjusted EBITDA Between 50 Percent And 100 Percent | Executive Officer | Performance Based Restricted Stock Units | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of adjustment of award amount |  | 100.00% |
Share-based Compensation Award, Performance Metric, Actual Adjusted EBITDA Between 100 Percent And 115 Percent | Executive Officer | Performance Based Restricted Stock Units | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of adjustment of award amount |  | 100.00% |
Share-based Compensation Award, Performance Metric, Actual Adjusted EBITDA Between 100 Percent And 115 Percent | Executive Officer | Performance Based Restricted Stock Units | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of adjustment of award amount |  | 150.00% |
Share-Based Compensation Award, Performance Metric, Actual Adjusted EBITDA In Excess Of 115 Percent | Executive Officer | Performance Based Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of adjustment of award amount |  | 150.00% |
Share-based Compensation Award, Tranche One | Executive Officer | Performance Based Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentage |  | 33.33% |
Share-based Compensation Award, Tranche One | Executive Officers And Employees | Time Based Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentage |  | 33.33% |
Share-based Compensation Award, Tranche Two | Executive Officer | Performance Based Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentage |  | 33.33% |
Share-based Compensation Award, Tranche Two | Executive Officers And Employees | Time Based Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentage |  | 33.33% |
Share-based Compensation Award, Tranche Three | Executive Officer | Performance Based Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentage |  | 33.33% |
Share-based Compensation Award, Tranche Three | Executive Officers And Employees | Time Based Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentage |  | 33.33% |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 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 (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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