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Stock-Based Compensation - Narrative (Details) - USD ($) |  | 3 Months Ended
--- | --- | ---
Mar. 07, 2018 | Mar. 31, 2018 | Apr. 01, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |  |  |
Stock-based compensation expense |  | $ 1,464,000 | $ 1,295,000
Unrecognized compensation expense related to stock awards |  | $ 8,987,000 |
Recognition period |  | 2 years |
Executive Officer [Member] | Performance Based Restricted Stock Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of units granted | 28,637 |  |
Aggregate grant date fair value | $ 2,794,000 |  |
Actual adjusted EBITDA target threshold |  | 50.00% |
Percentage of target award expected to vest |  | 100.00% |
Executive Officer [Member] | Performance Based Restricted Stock Units [Member] | Minimum [Member] | Actual EBITDA between 50% and 100% of Target Adjusted EBITDA [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of adjustment of award amount |  | 50.00% |
Executive Officer [Member] | Performance Based Restricted Stock Units [Member] | Minimum [Member] | Actual EBITDA between 100% and 115% of Target Adjusted EBITDA [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of adjustment of award amount |  | 100.00% |
Executive Officer [Member] | Performance Based Restricted Stock Units [Member] | Maximum [Member] | Actual EBITDA between 50% and 100% of Target Adjusted EBITDA [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of adjustment of award amount |  | 100.00% |
Executive Officer [Member] | Performance Based Restricted Stock Units [Member] | Maximum [Member] | Actual EBITDA between 100% and 115% of Target Adjusted EBITDA [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of adjustment of award amount |  | 150.00% |
Executive Officer [Member] | Performance Based Restricted Stock Units [Member] | Maximum [Member] | Actual EBITDA in Excess of 115% of Targeted Adjusted EBITDA [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of adjustment of award amount |  | 150.00% |
Executive Officer [Member] | Performance Based Restricted Stock Units [Member] | Tranche One [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentage |  | 33.33% |
Executive Officer [Member] | Performance Based Restricted Stock Units [Member] | Tranche Two [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentage |  | 33.33% |
Executive Officer [Member] | Performance Based Restricted Stock Units [Member] | Tranche Three [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentage |  | 33.33% |
Executive Officers And Employees [Member] | Time Based Restricted Stock Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of units granted | 28,086 |  |
Aggregate grant date fair value | $ 2,741,000 |  |
Executive Officers And Employees [Member] | Time Based Restricted Stock Units [Member] | Tranche One [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentage |  | 33.33% |
Executive Officers And Employees [Member] | Time Based Restricted Stock Units [Member] | Tranche Two [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentage |  | 33.33% |
Executive Officers And Employees [Member] | Time Based Restricted Stock Units [Member] | Tranche Three [Member] |  |  |
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://www.xbrl.org/2003/role/presentationRef -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=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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=96867065&loc=d3e5070-113901 + Details
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