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Basis of Presentation - Table 1 (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 USD ($) state | Mar. 31, 2017 USD ($) | Dec. 31, 2017
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | $ 1,046.0 | $ 957.1 |
Number of states in which entity operates | state | 36 |  |
Inpatient Rehabilitation Segment [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | $ 840.3 | 777.8 |
Number of states in which entity operates | state | 31 |  |
Home Health and Hospice Segment [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | $ 205.7 | 179.3 |
Number of states in which entity operates | state | 28 |  |
Net operating revenues [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | $ 1,046.0 | 957.1 |
Net operating revenues [Member] | Other income [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 10.0 | 9.8 |
Net operating revenues [Member] | Inpatient Rehabilitation Segment [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 840.3 | 777.8 |
Net operating revenues [Member] | Inpatient Rehabilitation Segment [Member] | Other income [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 9.8 | 9.6 |
Net operating revenues [Member] | Home Health and Hospice Segment [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 205.7 | 179.3 |
Net operating revenues [Member] | Home Health and Hospice Segment [Member] | Other income [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 0.2 | 0.2 |
Net operating revenues [Member] | Third-Party Payor [Member] | Medicare [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 801.4 | 726.0 |
Net operating revenues [Member] | Third-Party Payor [Member] | Medicare Advantage [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 92.5 | 83.0 |
Net operating revenues [Member] | Third-Party Payor [Member] | Managed Care [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 92.6 | 92.0 |
Net operating revenues [Member] | Third-Party Payor [Member] | Medicaid [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 25.2 | 22.8 |
Net operating revenues [Member] | Third-Party Payor [Member] | Other third-party payors [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 12.0 | 11.4 |
Net operating revenues [Member] | Third-Party Payor [Member] | Workers' compensation [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 7.5 | 7.5 |
Net operating revenues [Member] | Third-Party Payor [Member] | Inpatient Rehabilitation Segment [Member] | Medicare [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 624.5 | 573.7 |
Net operating revenues [Member] | Third-Party Payor [Member] | Inpatient Rehabilitation Segment [Member] | Medicare Advantage [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 72.5 | 64.8 |
Net operating revenues [Member] | Third-Party Payor [Member] | Inpatient Rehabilitation Segment [Member] | Managed Care [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 85.0 | 84.9 |
Net operating revenues [Member] | Third-Party Payor [Member] | Inpatient Rehabilitation Segment [Member] | Medicaid [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 24.7 | 21.6 |
Net operating revenues [Member] | Third-Party Payor [Member] | Inpatient Rehabilitation Segment [Member] | Other third-party payors [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 12.0 | 11.4 |
Net operating revenues [Member] | Third-Party Payor [Member] | Inpatient Rehabilitation Segment [Member] | Workers' compensation [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 7.4 | 7.4 |
Net operating revenues [Member] | Third-Party Payor [Member] | Home Health and Hospice Segment [Member] | Medicare [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 176.9 | 152.3 |
Net operating revenues [Member] | Third-Party Payor [Member] | Home Health and Hospice Segment [Member] | Medicare Advantage [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 20.0 | 18.2 |
Net operating revenues [Member] | Third-Party Payor [Member] | Home Health and Hospice Segment [Member] | Managed Care [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 7.6 | 7.1 |
Net operating revenues [Member] | Third-Party Payor [Member] | Home Health and Hospice Segment [Member] | Medicaid [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 0.5 | 1.2 |
Net operating revenues [Member] | Third-Party Payor [Member] | Home Health and Hospice Segment [Member] | Other third-party payors [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 0.0 | 0.0 |
Net operating revenues [Member] | Third-Party Payor [Member] | Home Health and Hospice Segment [Member] | Workers' compensation [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 0.1 | 0.1 |
Net operating revenues [Member] | Self-Pay [Member] | Patients [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 4.8 | 4.6 |
Net operating revenues [Member] | Self-Pay [Member] | Inpatient Rehabilitation Segment [Member] | Patients [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | 4.4 | 4.4 |
Net operating revenues [Member] | Self-Pay [Member] | Home Health and Hospice Segment [Member] | Patients [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues | $ 0.4 | $ 0.2 |
Accounts receivable [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues by payor source (percent) | 100.00% |  | 100.00%
Accounts receivable [Member] | Third-Party Payor [Member] | Medicare [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues by payor source (percent) | 73.20% |  | 75.10%
Accounts receivable [Member] | Third-Party Payor [Member] | Managed Care, Medicare Advantage and Other Discount Plans [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues by payor source (percent) | 19.10% |  | 17.40%
Accounts receivable [Member] | Third-Party Payor [Member] | Medicaid [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues by payor source (percent) | 2.60% |  | 2.40%
Accounts receivable [Member] | Third-Party Payor [Member] | Other third-party payors [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues by payor source (percent) | 2.90% |  | 2.90%
Accounts receivable [Member] | Third-Party Payor [Member] | Workers' compensation [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues by payor source (percent) | 1.30% |  | 1.30%
Accounts receivable [Member] | Self-Pay [Member] | Patients [Member] | Payor Source [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net operating revenues by payor source (percent) | 0.90% |  | 0.90%

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