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Quarterly Results - Additional Information (Detail) (USD $) | 3 Months Ended
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Mar. 31, 2012 Resulting from an agreement entered into with the United States Department of Health and Human Services, the Secretary of Health and Human Services, and the Centers for Medicare and Medicaid Services | Mar. 31, 2012 Oklahoma Supplemental Hospital Offset Payment Program | Jun. 30, 2013 Implementation of EHR applications | Mar. 31, 2013 Implementation of EHR applications | Jun. 30, 2012 Implementation of EHR applications | Mar. 31, 2012 Implementation of EHR applications | Mar. 31, 2012 Implementation of EHR applications Federal fiscal years 2006 through 2009 | Jun. 30, 2012 Reimbursements related to prior years | Dec. 31, 2013 EHR applications | Sep. 30, 2013 EHR applications | Dec. 31, 2012 EHR applications | Sep. 30, 2012 EHR applications | Sep. 30, 2012 Write-off of deferred financing costs | Dec. 31, 2012 Sale of an acute care facility | Dec. 31, 2012 Professional and general liability self-insurance reserves relating to years prior to 2012 | Dec. 31, 2013 Professional and general liability self-insurance reserves relating to years prior to 2013 | Jun. 30, 2013 Professional and general liability self-insurance reserves relating to years prior to 2013
Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unfavorable pre-tax reduction |  |  | $ 8,900,000 | $ 1,100,000 | $ 8,000,000 | $ 8,300,000 | $ 2,400,000 |  |  |  |  |  | $ 29,200,000 |  |  |  |
Unfavorable after-tax reduction |  |  | 4,900,000 | 327,000 | 5,000,000 | 5,100,000 |  |  |  |  |  |  | 18,100,000 |  |  |  |
Tax reduction per diluted share | $ 0.19 | $ 0.04 | $ 0.05 | $ 0.01 | $ 0.05 | $ 0.05 |  | $ 0.03 | $ 0.12 | $ 0.05 | $ 0.06 | $ 0.01 | $ 0.19 | $ 0.17 | $ 0.16 | $ 0.09 | $ 0.38
Favorable pre-tax reduction | 30,200,000 | 7,000,000 |  |  |  |  |  | 5,500,000 | 19,400,000 | 8,400,000 | 8,900,000 | 2,200,000 |  | 26,400,000 | 27,200,000 | 15,600,000 | 65,000,000
Favorable after-tax reduction | 18,800,000 | 4,300,000 |  |  |  |  |  | 3,400,000 | 11,800,000 | 5,100,000 | 5,500,000 | 1,300,000 |  | 16,400,000 | 15,500,000 | 9,200,000 | 37,800,000
Unfavorable after tax impact related to acute care hospital construction |  |  |  |  |  | $ 2,700,000 |  |  |  |  |  |  |  |  |  |  |

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- Definition Favorable pre tax reduction. + References No definition available. + Details
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- Definition Unfavorable after tax charge to write off costs related to acute care hospital construction project. + References No definition available. + Details
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- Definition Unfavorable After Tax Reduction + References No definition available. + Details
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- Definition Unfavorable Pre Tax Reduction + References No definition available. + Details
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