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Commitments and Contingencies - Additional Information (Detail) £ in Millions |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Oct. 31, 2012 USD ($) Facility | Sep. 30, 2015 Hospital | Sep. 30, 2014 Facility | Dec. 31, 2015 GBP (£) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Dec. 31, 2011 USD ($) | Dec. 31, 2015 USD ($) | Nov. 30, 2010 USD ($) | Nov. 30, 2010 GBP (£)
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Self-insured for professional and general liability |  |  |  |  | $ 259,718,000 | $ 270,088,000 | $ 344,553,000 |  | $ 271,476,000 |  |
Compensation liability claims |  |  |  |  | 67,000,000 |  |  |  | 68,000,000 |  |
Compensation and related benefits |  |  |  |  | 32,000,000 |  |  |  | 34,000,000 |  |
Payment suspension period increased |  | 180 days |  |  |  |  |  |  |  |  |
Combined estimated future purchase obligations |  |  |  |  |  |  |  |  | 171,000,000 |  |
Defined benefit pension plan estimated payments through 2089 |  |  |  |  |  |  |  |  | 224,000,000 |  |
Other retirement plan liabilities |  |  |  |  |  |  |  |  | 18,000,000 |  |
Revenue Cycle Data Processing Services |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Combined estimated future purchase obligations |  |  |  |  |  |  |  |  | 70,000,000 |  |
Electronic Health Records Application |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Combined estimated future purchase obligations |  |  |  |  |  |  |  |  | 100,000,000 |  |
Estimated Minimum Liabilities For Physician Commitments |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Combined estimated future purchase obligations |  |  |  |  |  |  |  |  | 1,000,000 |  |
Construction Commitment |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Combined estimated future purchase obligations |  |  |  |  |  |  |  |  | 110,000,000 |  |
Related to Certain Equipment |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Combined estimated future purchase obligations |  |  |  |  |  |  |  |  | 242,000,000 |  |
Commercial Health Insurer and Self-insured Employee Benefit Plans |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Combined estimated future purchase obligations |  |  |  |  |  |  |  |  | 68,000,000 |  |
Location 1 |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Minimum Insurance Deductible |  |  |  |  |  |  |  |  | 50,000 |  |
Location 2 |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Minimum Insurance Deductible |  |  |  |  |  |  |  |  | 250,000 |  |
Earthquake |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Minimum Insurance Deductible |  |  |  |  |  |  |  |  | 250,000 |  |
Earthquake | PUERTO RICO |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Commercial property insurance policies covering catastrophic losses |  |  |  |  |  |  |  |  | 25,000,000 |  |
Maximum insurance deductible |  |  |  |  |  |  |  |  | 25,000 |  |
Flood | Location 1 |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum insurance deductible |  |  |  |  |  |  |  |  | 500,000 |  |
Flood | Location 2 |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum insurance deductible |  |  |  |  |  |  |  |  | 250,000 |  |
Professional And General Liability | Psi Subsidiaries |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Reduction in professional and general liability self-insurance reserves relating to prior years |  |  |  |  | 20,000,000 | 81,000,000 |  |  |  |  |
Weighting given to company-specific metrics |  |  |  |  |  |  | 100.00% | 75.00% |  |  |
General industry metrics |  |  |  |  |  |  | 0.00% | 25.00% |  |  |
Cygnet Health Care Limited |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of facilities | Facility |  |  | 17 |  |  |  |  |  |  |  |
Property insurance | £ |  |  |  | £ 180 |  |  |  |  |  |  |
Maximum | WindStormsMember |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Commercial property insurance policies covering catastrophic losses |  |  |  |  |  |  |  |  | $ 1,000,000,000 |  |
Percentage of insurance deductible |  |  |  |  |  |  |  |  | 5.00% |  |
Maximum | Earthquake |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Commercial property insurance policies covering catastrophic losses |  |  |  |  |  |  |  |  | $ 250,000,000 |  |
Maximum | Earthquake | UNITED STATES |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Commercial property insurance policies covering catastrophic losses |  |  |  |  |  |  |  |  | $ 100,000,000 |  |
Percentage of insurance deductible |  |  |  |  |  |  |  |  | 5.00% |  |
Minimum | WindStormsMember |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of insurance deductible |  |  |  |  |  |  |  |  | 3.00% |  |
Minimum | Earthquake | UNITED STATES |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of insurance deductible |  |  |  |  |  |  |  |  | 1.00% |  |
Professional Liability | Cygnet Health Care Limited |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Self-insured for professional and general liability | £ |  |  |  |  |  |  |  |  |  |  | £ 10
General Liability | Cygnet Health Care Limited |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Self-insured for professional and general liability | £ |  |  |  |  |  |  |  |  |  |  | £ 25
General and Professional Liability |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Self-insured for professional and general liability |  |  |  |  | 192,904,000 | 206,290,000 | $ 278,599,000 |  | $ 203,973,000 |  |
Self-insured for professional and general liability, current |  |  |  |  | 51,000,000 |  |  |  | $ 48,000,000 |  |
Subsidiaries | Professional Liability | Maximum |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Self-insured for professional and general liability |  |  |  |  |  |  |  |  |  | $ 10,000,000 |
Subsidiaries | General Liability | Maximum |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Self-insured for professional and general liability |  |  |  |  |  |  |  |  |  | $ 3,000,000 |
Subsidiaries | General And Professional Liability Insurance Policies |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of liability for claims paid under commercially insured coverage |  |  |  |  |  |  |  |  | 10.00% |  |
Subsidiaries | General And Professional Liability Insurance Policies | Maximum |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Purchased several excess policies through commercial insurance carriers per occurrence |  |  |  |  | $ 250,000,000 | $ 200,000,000 |  |  | $ 250,000,000 |  |
Liability for claims paid under commercially insured coverage |  |  |  |  |  |  |  |  | 60,000,000 |  |
Subsidiaries | General And Professional Liability Insurance Policies | Minimum |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Liability for claims paid under commercially insured coverage |  |  |  |  |  |  |  |  | 10,000,000 |  |
Psychiatric Solutions Inc | General And Professional Liability Insurance Policies | Maximum |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Self-insured for professional and general liability |  |  |  |  |  |  |  |  | $ 3,000,000 |  |
Behavioral Health Facilities Acquired From Ascend Health Corporation |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of facilities | Facility | 9 |  |  |  |  |  |  |  |  |  |
Behavioral Health Facilities Acquired From Ascend Health Corporation | General And Professional Liability Insurance Policies |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Minimum Insurance Deductible | $ 100,000 |  |  |  |  |  |  |  |  |  |
Behavioral Health Facilities Acquired From Ascend Health Corporation | General And Professional Liability Insurance Policies | Maximum |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Self-insured for professional and general liability | $ 12,000,000 |  |  |  |  |  |  |  |  |  |
Behavioral Health Care Facilities |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of facilities | Facility | 21 |  |  |  |  |  |  |  |  |  |
DPW |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Repayment of legal settlement amount on demand |  |  |  |  |  |  |  | $ 4,000,000 |  |  |
Percentage of federal share on payments |  |  |  |  |  |  |  | 55.00% |  |  |
DPW | Pennsylvania |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of behavioral health care hospitals | Hospital |  | 7 |  |  |  |  |  |  |  |  |

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