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Share-Based Compensation (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
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12 Months Ended |
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Dec. 25, 2013
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Dec. 26, 2012
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Dec. 28, 2011
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Dec. 29, 2010
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Number of share-based compensation plans |
3 |
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| Shares available for grant |
800,000 |
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Stock Options [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Vesting period |
3 years |
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| Contractual life |
10 years |
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| Aggregate intrinsic value of the options exercised |
$ 2.6 |
$ 1.7 |
$ 3.6 |
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| Weighted-average fair value per option of options granted |
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|
$ 1.98 |
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| Unrecognized compensation cost related to unvested stock option awards outstanding |
0.1 |
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| Unrecognized compensation cost, expected weighted average period |
0 years 1 month 10 days |
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Performance Shares [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Unrecognized compensation cost, expected weighted average period |
1 year 1 month 28 days |
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| Nonvested performance shares outstanding (shares) |
700,000 |
800,000 |
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| Fair value of shares that vested |
3.1 |
1.9 |
2.0 |
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| Equity awards granted (shares) |
331,000 |
397,000 |
416,000 |
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| Equity awards, grant date fair value (US$ per share) |
$ 8.05 |
$ 6.05 |
$ 3.99 |
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| Cash payments |
1.2 |
1.0 |
0.8 |
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| Common stock shares issued (shares) |
300,000 |
200,000 |
300,000 |
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| Accrued compensation included as a component of other current liabilities |
0.7 |
0.4 |
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| Accrued compensation included as a component of other noncurrent liabilities |
1.9 |
0.9 |
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| Unrecognized compensation cost related to unvested performance share awards outstanding |
4.3 |
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| Equity awards outstanding, vested and nonvested (shares) |
832,000 |
933,000 |
1,276,000 |
1,450,000 |
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Restricted stock units [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Equity awards granted (shares) |
100,000 |
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| Equity awards, grant date fair value (US$ per share) |
$ 5.95 |
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| Common stock shares issued (shares) |
100,000 |
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| Equity awards outstanding, vested and nonvested (shares) |
800,000 |
700,000 |
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| Unrecognized compensation cost related to unvested board deferred stock units outstanding |
0.2 |
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| Unrecognized compensation cost related to unvested board deferred stock units, expected weighted average period |
0 years 4 months 0 days |
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2012 Omnibus Plan [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Shares available for grant |
3,600,000 |
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Performance award granted January 2013 [Member] | Performance Shares [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Nonvested performance shares outstanding (shares) |
300,000 |
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| Equity awards granted (shares) |
331,000 |
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| Employee performance-based target cash awards |
2.1 |
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| Equity awards, grant date fair value (US$ per share) |
$ 8.05 |
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| Performance period |
3 years |
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| Minimum percentage of target awards to be earned (in hundredths) |
0.00% |
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| Maximum percentage of target awards to be earned (in hundredths) |
200.00% |
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| Performance-based target cash awards outstanding |
$ 2.1 |
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