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Other Investments and Assets - Summary of Other Investments and Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
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Investments All Other Investments [Abstract] |  |
Cash surrender value of life insurance | $ 23,167 | $ 23,197
Self-insured liability receivable | 10,463 | 10,463
Workers’ compensation insurance security deposits | 3,550 | 4,050
Other mutual funds | 2,560 | 2,062
Other | 7,005 | 4,525
Other investments and assets | $ 46,745 | $ 44,297

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- Definition Current year monetary amount of the change in worker's compensation reserve liability resulting from the discount applied to reduce the reserve to present value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.(a),13(b)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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