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Schedule of Disaggregates Revenue by Major Source (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 2,804,391 | $ 2,687,516
Percentage of Net Revenue |  | 100.00% | 100.00%
Medicare |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 473,365 | $ 485,245
Percentage of Net Revenue |  | 17.00% | 18.00%
Managed Medicare |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 261,362 | $ 221,952
Percentage of Net Revenue |  | 9.00% | 8.00%
Medicaid |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 277,426 | $ 283,302
Percentage of Net Revenue |  | 10.00% | 11.00%
Managed Medicaid |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 401,004 | $ 342,053
Percentage of Net Revenue |  | 14.00% | 13.00%
Managed Care (HMO and PPOs) |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 918,265 | $ 855,842
Percentage of Net Revenue |  | 33.00% | 32.00%
UK Revenue |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 136,702 | $ 114,741
Percentage of Net Revenue |  | 5.00% | 4.00%
Other Patient Revenue and Adjustments,Net |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 175,361 | $ 229,555
Percentage of Net Revenue |  | 6.00% | 9.00%
Other Non-patient Revenue |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 160,906 | $ 154,826
Percentage of Net Revenue |  | 6.00% | 6.00%
Acute Care Hospital Services |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 1,514,844 | $ 1,445,632
Percentage of Net Revenue |  | 100.00% | 100.00%
Acute Care Hospital Services | Medicare |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 335,909 | $ 342,718
Percentage of Net Revenue |  | 22.00% | 24.00%
Acute Care Hospital Services | Managed Medicare |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 209,103 | $ 176,957
Percentage of Net Revenue |  | 14.00% | 12.00%
Acute Care Hospital Services | Medicaid |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 104,510 | $ 105,966
Percentage of Net Revenue |  | 7.00% | 7.00%
Acute Care Hospital Services | Managed Medicaid |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 133,731 | $ 111,277
Percentage of Net Revenue |  | 9.00% | 8.00%
Acute Care Hospital Services | Managed Care (HMO and PPOs) |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 570,383 | $ 497,780
Percentage of Net Revenue |  | 38.00% | 34.00%
Acute Care Hospital Services | UK Revenue |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 0 | $ 0
Percentage of Net Revenue |  | 0.00% | 0.00%
Acute Care Hospital Services | Other Patient Revenue and Adjustments,Net |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 51,883 | $ 112,570
Percentage of Net Revenue |  | 3.00% | 8.00%
Acute Care Hospital Services | Other Non-patient Revenue |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 109,325 | $ 98,364
Percentage of Net Revenue |  | 7.00% | 7.00%
Behavioral Health Services |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues | [1] | $ 1,286,383 | $ 1,237,996
Percentage of Net Revenue |  | 100.00% | 100.00%
Behavioral Health Services | Medicare |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 137,456 | $ 142,527
Percentage of Net Revenue |  | 11.00% | 12.00%
Behavioral Health Services | Managed Medicare |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 52,259 | $ 44,995
Percentage of Net Revenue |  | 4.00% | 4.00%
Behavioral Health Services | Medicaid |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 172,916 | $ 177,336
Percentage of Net Revenue |  | 13.00% | 14.00%
Behavioral Health Services | Managed Medicaid |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 267,273 | $ 230,776
Percentage of Net Revenue |  | 21.00% | 19.00%
Behavioral Health Services | Managed Care (HMO and PPOs) |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 347,882 | $ 358,062
Percentage of Net Revenue |  | 27.00% | 29.00%
Behavioral Health Services | UK Revenue |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 136,702 | $ 114,741
Percentage of Net Revenue |  | 11.00% | 9.00%
Behavioral Health Services | Other Patient Revenue and Adjustments,Net |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 123,478 | $ 116,985
Percentage of Net Revenue |  | 10.00% | 9.00%
Behavioral Health Services | Other Non-patient Revenue |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 48,417 | $ 52,574
Percentage of Net Revenue |  | 4.00% | 4.00%
Other |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 3,164 | $ 3,888
Other | Other Non-patient Revenue |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Net revenues |  | $ 3,164 | $ 3,888
[1] | Includes net revenues generated from our behavioral health care facilities located in the U.K. amounting to approximately $137 million and $115 million for the three-month periods ended March 31, 2019 and 2018, respectively. Total assets at our U.K. behavioral health care facilities were approximately $1.237 billion and $1.176 billion as of March 31, 2019 and 2018, respectively.

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