Details of Certain Balance Sheet Accounts - Accrued Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Details Of Certain Balance Sheet Accounts [Abstract]
Health insurance	$ 11,700	$ 11,200
Workers' compensation	23,900	19,800
Legal and other settlements	10,500	5,200
Lease liability	600	800
Charity care	700	700
Estimated Medicare CAP liability	1,400	2,800
Hospice cost of revenue	6,800	5,700
OIG Self-Disclsoure Accrual	4,700	0
Patient Liability	5,100	4,300
Other	6,600	5,800
Accrued expenses	$ 71,965	$ 56,329