Earnings Per Share Calculation of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
Mar. 31, 2016	Mar. 29, 2015
Earnings Per Share [Abstract]
Net income, as reported	$ 11,093	$ 36,417
Dividends distributed to Warrants	48	0
Undistributed earnings allocated to Warrants	0	706
Net income attributable to common shareholders for basic EPS	11,045	35,711
Undistributed earnings allocated to dilutive securities	0	1
Net income attributable to common shareholders for diluted EPS	$ 11,045	$ 35,712
Weighted average shares outstanding - basic (shares)	92,491	95,411
Impact of dilutive securities (shares)	132	125
Weighted average shares outstanding - diluted (shares)	92,623	95,536
Basic (usd per share)	$ 0.12	$ 0.37
Diluted (usd per share)	$ 0.12	$ 0.37

Total Dividends Distributed to Warrants as Participating Securities Under Two-class Method

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Undistributed Earnings Loss Allocated to Participating Securities, Basic and Diluted, Continuing Operations

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Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise of dilutive convertible securities excluding adjustments related to ESOP convertible preferred stock, stock options, and restrictive stock units.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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