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Recent Accounting Standards Adopted (Details) - USD ($) $ in Thousands |  | 3 Months Ended
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Dec. 30, 2017 | Mar. 31, 2018
Recent Accounting Standards Adopted |  |
Increase in cumulative effect adjustment on opening balance of retained earnings |  | $ 366
ASU 2016-09 |  |
Recent Accounting Standards Adopted |  |
Increase in cumulative effect adjustment on opening balance of retained earnings | $ 400 |

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- Definition Amount of the cumulative effect on retained earnings net of related income tax effect. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22663-107794 + Details
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