Description of Business and Basis of Presentation - Additional Information (Detail) |
9 Months Ended |
|---|---|
|
Sep. 30, 2016
State
Beds
Facilities
| |
| Accounting Policies [Abstract] | |
| Number of facilities | Facilities | 589 |
| Number of beds | Beds | 17,900 |
| Number of operating states | State | 39 |