Basis of Presentation Basis of Presentation - Table 2 (Details)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Medicare	75.40%	74.90%
Medicare Advantage	7.80%	8.20%
Managed care	9.50%	10.00%
Medicaid	3.40%	2.60%
Other third-party payors	1.40%	1.50%
Workers’ compensation	0.90%	0.90%
Patients	0.50%	0.70%
Other income	1.10%	1.20%
Total	100.00%	100.00%
Inpatient Rehabilitation Hospital [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Medicare	73.80%	73.50%
Medicare Advantage	7.60%	8.30%
Managed care	11.00%	11.20%
Medicaid	3.00%	2.00%
Other third-party payors	1.60%	1.70%
Workers’ compensation	1.10%	1.10%
Patients	0.60%	0.80%
Other income	1.30%	1.40%
Total	100.00%	100.00%