Basis of Presentation Basis of Presentation - Table 2 (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Medicare	74.70%	74.50%	75.10%	74.70%
Medicare Advantage	8.10%	7.70%	7.90%	8.00%
Managed care	10.00%	10.10%	9.80%	10.00%
Medicaid	3.20%	3.10%	3.30%	2.90%
Other third-party payors	1.40%	1.80%	1.40%	1.60%
Workers’ compensation	0.70%	0.90%	0.80%	0.90%
Patients	0.50%	0.60%	0.50%	0.60%
Other income	1.40%	1.30%	1.20%	1.30%
Total	100.00%	100.00%	100.00%	100.00%
Inpatient Rehabilitation Hospital [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Medicare	73.10%	72.70%	73.30%	73.10%
Medicare Advantage	7.80%	7.80%	7.70%	8.10%
Managed care	11.50%	11.40%	11.20%	11.30%
Medicaid	2.90%	2.60%	3.00%	2.30%
Other third-party payors	1.70%	2.10%	1.70%	1.90%
Workers’ compensation	0.80%	1.10%	1.00%	1.10%
Patients	0.60%	0.70%	0.60%	0.70%
Other income	1.60%	1.60%	1.50%	1.50%
Total	100.00%	100.00%	100.00%	100.00%