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Basis of Presentation Summary of Significant Accounting Policies - Textual (Details) - state | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Number of states in which entity operates |  | 36
Collection success rate of denied payments (percent) |  | 70.00%
RAC Audits [Member] | Medicare [Member] | Payor Source [Member] | Net operating revenues [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Net operating revenues by payor source (percent) | 1.00% |

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- Definition The historical collection percentage of accounts receivable that have been denied and appealed up to an administrative law judge hearing as of the balance sheet date. The denial of certain diagnosis codes by Medicare contractors are based on medical necessity and in most instances are disputed or appealed by the Company. + References No definition available. + Details
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