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Other Balance Sheet And Statement Of Earnings Captions (Other Operating Revenue) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Total | $ 10,128 | $ 10,416 | $ 8,201
Pari-Mutuel Revenue [Member] |  |  |
Total | 3,665 | 3,674 | 2,643
Bowling Revenue [Member] |  |  |
Total | 642 | 644 | 662
Other Revenue [Member] |  |  |
Total | $ 5,821 | $ 6,098 | $ 4,896

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- Definition Amount, after sales adjustments, returns, allowances, and discounts, of revenue classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(a),(d)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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