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Summary of Significant Accounting Policies and Basis of Presentation (Tables) | 12 Months Ended
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Dec. 31, 2016
Accounting Policies [Abstract] |
Property and Equipment Estimated Useful Lives | Depreciation expense on land improvements, buildings and improvements, and equipment is computed using the straight-line method as follows:
Land improvements |  |  | 15 years |
Buildings and improvements |  |  | 15 to 40 years |
Equipment |  |  | 3 to 15 years |
Summary of Changes in the Company's Self-Insurance Liability | A summary of changes in the Company’s self-insurance liability is as follows:
| December 31, |  |  | January 2, |  |  | January 3, |
(In thousands) | 2016 |  |  | 2016 |  |  | 2015 |
Balance at beginning of period | $ |  | 14,466 |  |  | $ |  | 19,413 |  |  | $ |  | 22,454 |
Expenses |  |  | 49,560 |  |  |  |  | 43,851 |  |  |  |  | 53,297 |
Claim payments, net of employee contributions |  |  | (49,296 | ) |  |  |  | (48,798 | ) |  |  |  | (56,338 | )
Balance at end of period | $ |  | 14,730 |  |  | $ |  | 14,466 |  |  | $ |  | 19,413 |
Schedule of Computation of Basic and Diluted EPS for Continuing Operations | The following table sets forth the computation of basic and diluted EPS for continuing operations:
| December 31, |  |  | January 2, |  |  | January 3, |
| 2016 |  |  | 2016 |  |  | 2015 |
(In thousands, except per share amounts) | (52 Weeks) |  |  | (52 Weeks) |  |  | (53 Weeks) |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earnings from continuing operations | $ |  | 57,056 |  |  | $ |  | 63,166 |  |  | $ |  | 59,120 |
Adjustment for earnings attributable to participating securities |  |  | (1,011 | ) |  |  |  | (1,098 | ) |  |  |  | (1,015 | )
Earnings from continuing operations used in calculating earnings per share | $ |  | 56,045 |  |  | $ |  | 62,068 |  |  | $ |  | 58,105 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding, including participating securities |  |  | 37,483 |  |  |  |  | 37,612 |  |  |  |  | 37,641 |
Adjustment for participating securities |  |  | (664 | ) |  |  |  | (654 | ) |  |  |  | (646 | )
Shares used in calculating basic earnings per share |  |  | 36,819 |  |  |  |  | 36,958 |  |  |  |  | 36,995 |
Effect of dilutive stock options |  |  | 73 |  |  |  |  | 106 |  |  |  |  | 69 |
Shares used in calculating diluted earnings per share |  |  | 36,892 |  |  |  |  | 37,064 |  |  |  |  | 37,064 |
Basic earnings per share from continuing operations | $ |  | 1.52 |  |  | $ |  | 1.68 |  |  | $ |  | 1.57 |
Diluted earnings per share from continuing operations | $ |  | 1.52 |  |  | $ |  | 1.67 |  |  | $ |  | 1.57 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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