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Share-Based Compensation (Restricted Stock Units) (Details) - $ / shares shares in Thousands | 12 Months Ended
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Dec. 26, 2018 | Dec. 27, 2017 | Dec. 28, 2016
Performance Shares [Member] |  |  |
Units [Roll Forward]: |  |  |
Outstanding, beginning of year (shares) | 1,737 |  |
Granted (shares) | 471 |  |
Vested (shares) | (489) |  |
Forfeited (shares) | (31) |  |
Outstanding, end of year (shares) | 1,688 | 1,737 |
Weighted-Average Grant Date Fair Value [Roll Forward]: |  |  |
Outstanding, beginning of year (US$ per share) | $ 11.11 |  |
Granted (US$ per share) | 16.97 | $ 12.59 | $ 9.47
Vested (US$ per share) | 11.43 |  |
Forfeited (US$ per share) | 11.65 |  |
Outstanding, end of year (US$ per share) | $ 12.65 | $ 11.11 |
Convertible, end of year (shares) | 630 |  |
Convertible, end of year, weighted-average grant date fair value (US$ per share) | $ 9.47 |  |
Restricted stock units [Member] |  |  |
Units [Roll Forward]: |  |  |
Outstanding, beginning of year (shares) | 900 |  |
Outstanding, end of year (shares) | 800 | 900 |
Weighted-Average Grant Date Fair Value [Roll Forward]: |  |  |
Granted (US$ per share) | $ 15.46 |  |

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- Definition The weighted average fair value of awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee. Includes vested and nonvested awards. + References No definition available. + Details
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- Definition Number of equity instruments other than options outstanding, vested + References No definition available. + Details
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- Definition The weighted average fair value of equity instruments other than options outstanding, vested + References No definition available. + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + 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 (c)(2)(iii)(3) -URI http://asc.fasb.org/extlink&oid=109197908&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://fasb.org/us-gaap/role/ref/legacyRef -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=109197908&loc=d3e5070-113901 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + 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 (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Number of non-option equity instruments exercised by participants. + 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 (c)(1)(iv)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Number of shares under non-option equity instrument agreements that were cancelled as a result of occurrence of a terminating event. + 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 (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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