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Concentration of Risk	12 Months Ended
Concentration of Risk	Dec. 31, 2018
Risks and Uncertainties [Abstract]
Concentration of Risk	Concentration of Risk The Company operates in 36 states within the continental United States. The Company's facilities in Louisiana, Tennessee, Arkansas, Mississippi, Kentucky, Florida, and Alabama accounted for approximately 54.2%, 63.0% and 66.6% of net service revenue during the years ended December 31, 2018, 2017 and 2016, respectively. Any material change in the current economic or competitive conditions in these states could have a disproportionate effect on the Company’s overall business results.