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Stock Compensation (Details) $ / shares in Units, $ in Millions | 3 Months Ended
--- | ---
Mar. 30, 2019 USD ($) trading_day $ / shares | Mar. 31, 2018 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Stock based compensation expense | $ 0.7 | $ 9.2
Stock Appreciation Rights (SARs) |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Weighted average exercise price, trading day average | trading_day | 20 |
Weighted average exercise price (in dollars per share) | $ / shares | $ 7.00 |
Deferred compensation liability | $ 7.2 |
Payable within thirty days of the vesting date | Stock Appreciation Rights (SARs) |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Vesting period | 30 days |
Payable within one year of vesting date | Stock Appreciation Rights (SARs) |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Vesting period | 1 year |

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- Definition Share-Based Compensation Arrangements By Share-Based Payment Award, Options, Weighted Average Exercise Price, Trading Day Average + References No definition available. + Details
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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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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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