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v2.4.1.9

Summary of Long-Term Debt (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Notes Payable And Mortgages Payable |  |
Debt Instrument [Line Items] |  |
Obligations under capitalized leases | 21,600 us-gaap_CapitalLeaseObligations / us-gaap_LineOfCreditFacilityAxis = uhs_NotesPayableAndMortgagesPayableMember | 6,633 us-gaap_CapitalLeaseObligations / us-gaap_LineOfCreditFacilityAxis = uhs_NotesPayableAndMortgagesPayableMember
Weighted average interest | 6.40%us-gaap_LongtermDebtWeightedAverageInterestRate / us-gaap_LineOfCreditFacilityAxis = uhs_NotesPayableAndMortgagesPayableMember | 5.90%us-gaap_LongtermDebtWeightedAverageInterestRate / us-gaap_LineOfCreditFacilityAxis = uhs_NotesPayableAndMortgagesPayableMember
Term Loans With Varying Maturities |  |
Debt Instrument [Line Items] |  |
Debt instruments, maturity date | 2037 |
Term Loan A |  |
Debt Instrument [Line Items] |  |
Unamortized discount | 2,035 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LineOfCreditFacilityAxis = uhs_TermLoanFacilityMember | 3,340 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LineOfCreditFacilityAxis = uhs_TermLoanFacilityMember
Term Loan B Facility |  |
Debt Instrument [Line Items] |  |
Unamortized discount | 0 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LineOfCreditFacilityAxis = uhs_TermLoanBFacilityMember | 6,473 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LineOfCreditFacilityAxis = uhs_TermLoanBFacilityMember
Revenue Bonds |  |
Debt Instrument [Line Items] |  |
Interest at floating rates | 0.05%us-gaap_DebtInstrumentInterestRateDuringPeriod / us-gaap_LineOfCreditFacilityAxis = uhs_RevenueBondsMember | 0.10%us-gaap_DebtInstrumentInterestRateDuringPeriod / us-gaap_LineOfCreditFacilityAxis = uhs_RevenueBondsMember
Debt instruments, maturity date | 2015 |
3.750% Senior Secured Notes due 2019 |  |
Debt Instrument [Line Items] |  |
Debt instruments, maturity date | 2019 |
Senior notes, interest rate | 3.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LineOfCreditFacilityAxis = uhs_ThreePointSevenFiveZeroPercentSeniorSecuredNotesDueTwoThousandNineteenMember |
Unamortized discount | 198 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LineOfCreditFacilityAxis = uhs_ThreePointSevenFiveZeroPercentSeniorSecuredNotesDueTwoThousandNineteenMember |
4.750% Senior Secured Notes due 2022 |  |
Debt Instrument [Line Items] |  |
Debt instruments, maturity date | 2022 |
Senior notes, interest rate | 4.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LineOfCreditFacilityAxis = uhs_FourPointSevenFiveZeroPercentSeniorSecuredNotesDueTwoThousandTwentyTwoMember |
Unamortized discount | 204 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LineOfCreditFacilityAxis = uhs_FourPointSevenFiveZeroPercentSeniorSecuredNotesDueTwoThousandTwentyTwoMember |
7.125% Senior Secured Notes due 2016 |  |
Debt Instrument [Line Items] |  |
Debt instruments, maturity date | 2016 |
Senior notes, interest rate | 7.125%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LineOfCreditFacilityAxis = uhs_SevenPointOneTwoFivePercentageSecuredNotesDueOnTwoThousandSixteenMember |
Unamortized net premium | 7 us-gaap_DebtInstrumentUnamortizedPremium / us-gaap_LineOfCreditFacilityAxis = uhs_SevenPointOneTwoFivePercentageSecuredNotesDueOnTwoThousandSixteenMember | 11 us-gaap_DebtInstrumentUnamortizedPremium / us-gaap_LineOfCreditFacilityAxis = uhs_SevenPointOneTwoFivePercentageSecuredNotesDueOnTwoThousandSixteenMember
7.00% Senior Unsecured Notes due 2018 |  |
Debt Instrument [Line Items] |  |
Debt instruments, maturity date | 2018 |
Senior notes, interest rate | 7.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LineOfCreditFacilityAxis = uhs_SevenPercentageUnsecuredNotesDueOnTwoThousandEighteenMember |

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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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- Definition The average effective interest rate during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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- Definition The amount of debt premium that was originally recognized at the issuance of the instrument that has yet to be amortized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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