INCOME TAXES (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Tax Contingency [Line Items]
Effective income tax rate	50.10%	51.50%	50.20%	46.20%
Effective income tax rate increase (decrease) during period	0.90%	0.70%	1.70%	0.20%
Effective income tax rate increase (decrease), excess tax benefit due to new guidance			(1.00%)
Concentra Inc.
Income Tax Contingency [Line Items]
Effective income tax rate increase (decrease) during period		(4.60%)		(4.60%)