Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013 Segment	Dec. 31, 2012	Dec. 31, 2011
Summary Of Significant Policies [Line Items]
Percentage of revenue	100.00%	100.00%	100.00%
Cost report receivables	$ 800,000	$ 1,100,000
Net adjustments to estimated cost report settlements resulted in increases to revenue	200,000	100,000
Costs of providing charity care services	2,600,000	1,200,000	800,000
Insurance claims in excess of deductible	250,000
Insured excess limit	35,000,000
Professional and general liability reserve	14,000,000	6,400,000
Professional and general liability reserve current	4,100,000	4,000,000
Professional and general liability reserve noncurrent	9,900,000	2,400,000
Insurance receivable	11,200,000	4,800,000
Insurance receivable current	3,400,000	3,350,000
Insurance receivable noncurrent	7,800,000	1,400,000
Workers compensation insurance claims deductible per accident	500,000
Reserve for workers compensation liability	6,200,000	3,900,000
Other accrued liabilities	4,100,000	1,800,000
Other long-term liabilities	2,100,000	2,100,000
Depreciation expense	16,300,000	7,400,000	2,700,000
Number of operating segment	1
Number of reporting unit	1
Intangible assets impairment charges	0	0	0
Debt issuance costs	13,300,000	13,600,000
Accumulated amortization	6,100,000	3,500,000
Amortization expenses reported as interest expense	2,300,000	2,300,000
Estimated amortization of debt issuance costs year one	2,600,000
Estimated amortization of debt issuance costs year two	2,700,000
Estimated amortization of debt issuance costs year three	2,700,000
Estimated amortization of debt issuance costs year four	2,800,000
Estimated amortization of debt issuance costs year five	$ 1,200,000
Minimum [Member] | Buildings and Improvements [Member]
Summary Of Significant Policies [Line Items]
Property plant and equipment estimated useful life	10 years
Minimum [Member] | Equipment [Member]
Summary Of Significant Policies [Line Items]
Property plant and equipment estimated useful life	3 years
Maximum [Member] | Buildings and Improvements [Member]
Summary Of Significant Policies [Line Items]
Property plant and equipment estimated useful life	40 years
Maximum [Member] | Equipment [Member]
Summary Of Significant Policies [Line Items]
Property plant and equipment estimated useful life	7 years
Arkansas [Member]
Summary Of Significant Policies [Line Items]
Percentage of revenue generated by facility	17.00%	13.00%
Mississippi [Member]
Summary Of Significant Policies [Line Items]
Percentage of revenue generated by facility	8.00%	12.00%
Medicare and Medicaid [Member]
Summary Of Significant Policies [Line Items]
Percentage of revenue	70.00%	75.00%	82.00%