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Income Taxes - Additional Information (Detail) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 USD ($) Facility | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Income Taxes [Line Items] |  |  |
Favorable discrete tax items | $ 1,000 | $ 1,000 | $ 1,000
Foreign pre-tax earnings | $ 41,000 | 15,000 | 6,000
Effective income tax rate, foreign | 20.25% |  |
Undistributed foreign earnings | $ 53,000 |  |
Unrecognizable deferred tax liability related to foreign earnings | 8,000 |  |
Deferred federal and state tax benefit | 42,000 | 17,000 |
Future taxable income, amount | 1,080,000 |  |
Deferred state tax benefit (net of the federal benefit) | (302) | 7,525 | $ 3,278
Net operating losses | 62,541 | 60,521 |
Deferred foreign tax benefit | 5,545 |  |
Valuation allowances | 52,567 | 52,764 |
Increase in estimated liabilities for uncertain tax positions | 1,000 | 1,000 |
Decrease in estimated liabilities for uncertain tax positions due to the lapse of the statute of limitations | 1,000 |  |
Impact of unrecognized tax benefits if recognized | $ 1,000 | 2,000 |
Period of expiration of the statute of limitations for certain jurisdictions | Within the next twelve months |  |
Jurisdictions statutes of limitations expiration period | 12 months |  |
Maximum |  |  |
Income Taxes [Line Items] |  |  |
Accrued interest and penalties | $ 1,000 | 1,000 |
Foreign and U.S. state and local jurisdictions have statutes of limitations, in years | 4 years |  |
Minimum |  |  |
Income Taxes [Line Items] |  |  |
Foreign and U.S. state and local jurisdictions have statutes of limitations, in years | 3 years |  |
Allowance in relation to state tax benefit |  |  |
Income Taxes [Line Items] |  |  |
Valuation allowances | $ 51,000 | 50,000 |
Net Operating Losses |  |  |
Income Taxes [Line Items] |  |  |
Increase in valuation allowance | 1,000 |  |
Foreign Net Operating Losses |  |  |
Income Taxes [Line Items] |  |  |
Increase in valuation allowance | 2,000 | $ 3,000 |
State and Local Jurisdiction |  |  |
Income Taxes [Line Items] |  |  |
Deferred state tax benefit (net of the federal benefit) | 53,000 |  |
Foreign Tax Authority |  |  |
Income Taxes [Line Items] |  |  |
Net operating losses | $ 20,000 |  |
Behavioral Health Services |  |  |
Income Taxes [Line Items] |  |  |
Number of additional facilities acquired | Facility | 5 |  |

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