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Change in Accounting Estimate for Self-Insured Claims (Tables) | 12 Months Ended
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Dec. 31, 2016
Effect of Increase in Cost of Insurance and Claims | The following table summarizes the effect of the increase in the cost of insurance claims resulting from unfavorable development of prior year self-insured claims estimates on operating income, net income and earnings per share amounts in the consolidated statements of income for the fiscal years ended December 31, 2016, December 26, 2015 and December 27, 2014 (in thousands, except per share amounts):
|  | Fiscal Years Ended |
|  | December 31, 2016 |  |  | December 26, 2015 |  |  | December 27, 2014 |
Operating income |  | $ | 1,079 |  |  | $ | 4,852 |  |  | $ | 6,664 |
Net income |  |  | 667 |  |  |  | 2,999 |  |  |  | 4,118 |
Earnings per share |  | $ | 0.02 |  |  | $ | 0.07 |  |  | $ | 0.09 |
Diluted earnings per share |  | $ | 0.02 |  |  | $ | 0.07 |  |  | $ | 0.09 |

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- Definition Tabular disclosure of the change in an accounting estimate, including a change that occurs in an interim period. If a change in accounting estimate affects several future periods (for example, a change in the service life of a depreciable asset) disclose the effect on income from continuing operations, net income (or other appropriate captions of changes in the applicable net assets or performance indicator), and any related per-share amounts of the current period. Disclosure of the effects of a change in an accounting estimate that occurs in the ordinary course of business (such as uncollectible accounts or inventory obsolescence) is not required, unless the effect is material. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=68064558&loc=d3e777-108305 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 45 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6368906&loc=d3e21843-107793 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22595-107794 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.10-01.(a)(5)) -URI http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699 + Details
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