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Self-Insurance | 12 Months Ended
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Dec. 31, 2017
Self Insurance Reserves [Abstract] |
Self-Insurance | Self-Insurance The Company obtains various insurance coverages from commercial carriers at stated amounts as defined in the applicable policy. Losses related to deductible amounts are accrued based on the Company's estimate of expected losses plus incurred but not reported claims. As of December 31, 2017 and 2016, the Company accrued reserves of $165.0 million and $184.0 million, respectively, for these programs of which $101.7 million and $112.9 million is classified as long-term liabilities as of December 31, 2017 and 2016, respectively. As of December 31, 2017 and 2016, the Company accrued $17.5 million and $22.8 million, respectively, of estimated amounts receivable from the insurance companies under these insurance programs. During the years ended December 31, 2017 and 2016, the Company recorded a $9.9 million and $35.4 million decrease in insurance expense from changes in estimates, respectively, due to general liability and professional liability and workers compensation claims experience. The Company has secured self-insured retention risk under workers' compensation programs with cash deposits of $12.7 million and $12.4 million as of December 31, 2017 and 2016, respectively. Letters of credit securing the programs aggregated $71.8 million and $59.5 million as of December 31, 2017 and 2016, respectively. In addition, the Company also had deposits of $33.9 million and $37.4 million as of December 31, 2017 and 2016, respectively, to fund claims paid under a high deductible, collateralized insurance policy.

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