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Share-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 28, 2017 | Jun. 29, 2016 | Jun. 28, 2017 | Jun. 29, 2016
Total share-based compensation [Abstract] |  |  |  |
Total share-based compensation | $ 2,080 | $ 1,902 | $ 4,053 | $ 3,850
Performance shares [Member] |  |  |  |
Total share-based compensation [Abstract] |  |  |  |
Total share-based compensation | 1,904 | 1,688 | $ 3,844 | 3,422
Restricted Stock Units [Abstract] |  |  |  |
Performance period, equity award |  |  | 3 years |
Cash payments |  |  | $ 3,900 |
Maximum common stock shares issued (in shares) |  |  | 0.4 |
Unrecognized compensation cost [Abstract] |  |  |  |
Unrecognized compensation cost related to unvested share awards outstanding | 11,400 |  | $ 11,400 |
Unrecognized compensation cost, expected weighted average period |  |  | 1 year 11 months 8 days |
Performance shares [Member] | Minimum [Member] |  |  |  |
Restricted Stock Units [Abstract] |  |  |  |
Percentage of target awards to be earned (in hundredths) |  |  | 0.00% |
Performance shares [Member] | Maximum [Member] |  |  |  |
Restricted Stock Units [Abstract] |  |  |  |
Percentage of target awards to be earned (in hundredths) |  |  | 150.00% |
Performance shares [Member] | Performance shares that vest based on TSR [Member] |  |  |  |
Restricted Stock Units [Abstract] |  |  |  |
Equity awards granted (in shares) |  |  | 0.3 |
Equity awards, grant date fair value (in dollars per share) |  |  | $ 13.05 |
Performance shares [Member] | Performance shares that vest based on EBITDA growth [Member] |  |  |  |
Restricted Stock Units [Abstract] |  |  |  |
Equity awards granted (in shares) |  |  | 0.3 |
Equity awards, grant date fair value (in dollars per share) |  |  | $ 12.17 |
Restricted stock units for board members [Member] |  |  |  |
Total share-based compensation [Abstract] |  |  |  |
Total share-based compensation | 176 | $ 214 | $ 209 | $ 428
Restricted Stock Units [Abstract] |  |  |  |
Equity awards granted (in shares) |  | 0.1 |  |
Equity awards, grant date fair value (in dollars per share) |  | $ 12.04 |  |
Performance period, equity award |  |  | 1 year |
Cash payments related to replacement cash awards | 500 |  | $ 500 |
Unrecognized compensation cost [Abstract] |  |  |  |
Unrecognized compensation cost related to unvested share awards outstanding | $ 1,000 |  | $ 1,000 |
Unrecognized compensation cost, expected weighted average period |  |  | 1 year 1 month 2 days |

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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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- Definition Aggregate cash paid by the entity during the period to settle equity instruments granted under equity-based payment arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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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://www.xbrl.org/2003/role/presentationRef -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=96867065&loc=d3e5070-113901 + Details
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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://www.xbrl.org/2003/role/presentationRef -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=96867065&loc=d3e5070-113901 + Details
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- Definition Number of share instruments newly issued under a share-based compensation plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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