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Acquisitions of Businesses and Non-Controlling Interests - Additional Information (Details) (USD $) | 0 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended |
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Dec. 13, 2013 Installment | Dec. 09, 2013 | May 31, 2012 | Apr. 30, 2012 | Dec. 31, 2014 Clinic Partnership Installment | Dec. 31, 2013 Clinic Partnership Installment | Dec. 31, 2012 Clinic Partnership | Feb. 28, 2013 | May 31, 2013 | Apr. 30, 2013 | Apr. 30, 2014 | Feb. 28, 2014 | Dec. 31, 2013 | May 22, 2012
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of clinic practices acquired |  |  |  |  | 4 usph_NumberOfClinicAcquired | 3 usph_NumberOfClinicAcquired | 7 usph_NumberOfClinicAcquired |  |  |  |  |  |  |
Percentage of purchase of non controlling interest (in hundredths) | 90.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired | 60.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired |  |  |  |  |  |  |  |  |  |  |  | 70.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Cash paid for acquisition of interest in clinic | $ 35,500,000 us-gaap_PaymentsToAcquireBusinessesGross | $ 1,700,000 us-gaap_PaymentsToAcquireBusinessesGross | $ 6,090,000 us-gaap_PaymentsToAcquireBusinessesGross |  |  |  |  |  |  |  |  |  |  |
Seller notes issued for acquisition of interest in clinic | 500,000 usph_BusinessAcquisitionCostOfAcquiredEntityDebtIssued |  | 250,000 usph_BusinessAcquisitionCostOfAcquiredEntityDebtIssued |  | 400,000 usph_BusinessAcquisitionCostOfAcquiredEntityDebtIssued | 1,300,000 usph_BusinessAcquisitionCostOfAcquiredEntityDebtIssued | 350,000 usph_BusinessAcquisitionCostOfAcquiredEntityDebtIssued |  |  |  |  |  | 1,300,000 usph_BusinessAcquisitionCostOfAcquiredEntityDebtIssued | 250,000 usph_BusinessAcquisitionCostOfAcquiredEntityDebtIssued
Business acquisition number of installments to payment of purchase consideration | 2 usph_BusinessAcquisitionNumberOfInstallmentsToPaymentOfPurchaseConsideration |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenue recognized |  |  |  |  | 505,000 us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsRevenuesAndGainsRecognized |  |  |  |  |  |  |  |  |
Net earnings recognized |  |  |  |  | 119,000 us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsNetGainsAndLosses |  |  |  |  |  |  |  |  |
Aggregate purchase price for the acquired clinic practices |  |  |  |  |  | 238,000 us-gaap_BusinessCombinationConsiderationTransferred1 |  |  |  |  |  |  |  |
Percentage of Tax Deductible Goodwill (in hundredths) |  |  | 67.00%usph_PercentageOfTaxDeductibleGoodwill |  |  |  |  |  |  |  |  |  |  | 70.00%usph_PercentageOfTaxDeductibleGoodwill
Accrued interest seller note (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
Business acquisition, cost of acquired entity |  |  | 1,938,000 usph_BusinessAcquisitionCostOfAcquiredEntityPurchasePriceNet |  |  |  |  |  |  |  |  |  |  |
Number of annual installments |  |  |  |  | 2 usph_BusinessAcquisitionPurchasePriceAllocationNotesPayableNumberOfInstallment | 2 usph_BusinessAcquisitionPurchasePriceAllocationNotesPayableNumberOfInstallment |  |  |  |  |  |  | 2 usph_BusinessAcquisitionPurchasePriceAllocationNotesPayableNumberOfInstallment |
Remaining proportion of July 2011 acquisition, the company owned (in hundredths) |  |  |  | 50.00%usph_SaleOfProportionOfInterestInAcquisitionToLimitedPartner |  |  |  |  |  |  |  |  |  |
Sale of proportion of interest in acquisition to limited partner (in hundredths) |  |  |  | 1.00%usph_RemainingProportionOfAcquisitionOwned |  |  |  |  |  |  |  |  |  |
Number of separate transactions to purchase partnership interest |  |  |  |  | 4 usph_NumberOfSeparateTransactionsToPurchasePartnershipInterest | 15 usph_NumberOfSeparateTransactionsToPurchasePartnershipInterest | 15 usph_NumberOfSeparateTransactionsToPurchasePartnershipInterest |  |  |  |  |  |  |
Number of Partnership in which Interest Acquired |  |  |  |  | 4 usph_NumberOfPartnershipInWhichInterestAcquired | 10 usph_NumberOfPartnershipInWhichInterestAcquired | 15 usph_NumberOfPartnershipInWhichInterestAcquired |  |  |  |  |  |  |
Purchase price for additional non controlling interest |  |  |  |  | 600,000 us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent | 1,900,000 us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent | 2,200,000 us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent |  |  |  |  |  |  |
Proceeds from sales of interest |  |  |  |  |  | 800,000 usph_ProceedsFromSaleOfInterestInPartnershipUnitInNotesReceivable |  |  |  |  |  |  |  |
Business acquisition cost of acquired entity charge from cash |  |  |  |  |  | 200,000 us-gaap_ProceedsFromSaleOfInterestInPartnershipUnit |  |  |  |  |  |  |  |
Business acquisition cost of acquired entity charge from notes receivable |  |  |  |  |  | 600,000 usph_ProceedsFromSaleOfInterestInPartnershipUnitInCash |  |  |  |  |  |  |  |
Undistributed earnings |  |  |  |  | 100,000 usph_BusinessAcquisitionCostOfAcquiredEntityChargeFromUndistributedEarning | 100,000 usph_BusinessAcquisitionCostOfAcquiredEntityChargeFromUndistributedEarning | 200,000 usph_BusinessAcquisitionCostOfAcquiredEntityChargeFromUndistributedEarning |  |  |  |  |  |  |
Future tax benefits |  |  |  |  | 200,000 us-gaap_UnrecognizedTaxBenefits | 400,000 us-gaap_UnrecognizedTaxBenefits | 800,000 us-gaap_UnrecognizedTaxBenefits |  |  |  |  |  | 400,000 us-gaap_UnrecognizedTaxBenefits |
Remaining purchase price |  |  |  |  | 500,000 usph_BusinessAcquisitionCostOfAcquiredEntityChargeFromAdditionalPaidUpCapital | 1,000,000 usph_BusinessAcquisitionCostOfAcquiredEntityChargeFromAdditionalPaidUpCapital | 2,000,000 usph_BusinessAcquisitionCostOfAcquiredEntityChargeFromAdditionalPaidUpCapital |  |  |  |  |  |  |
Number of partnership in interest sale by parent |  |  |  |  |  | 3 usph_NumberOfPartnershipInInterestSaleByParent |  |  |  |  |  |  |  |
Proceeds from Divestiture of Interest in Consolidated Subsidiaries |  |  |  |  |  | 239,000 us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries |  |  |  |  |  |  |  |
Consolidation less than wholly owned subsidiary parent ownership interest changes sale of interest amount credit to additional paid up capital |  |  |  |  |  | 5,000 usph_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesSaleOfInterestAmountCreditToAdditionalPaidUpCapital |  |  |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of purchase of non controlling interest (in hundredths) |  |  |  |  | 1.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_RangeAxis = us-gaap_MinimumMember | 1.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_RangeAxis = us-gaap_MinimumMember | 10.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  | 1.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_RangeAxis = us-gaap_MinimumMember |
Consolidation less than wholly owned subsidiary parent ownership interest changes sale of interest percent by parent (in hundredths) |  |  |  |  |  | 0.64%usph_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesSaleOfInterestPercentByParent / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of purchase of non controlling interest (in hundredths) |  |  |  |  | 35.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_RangeAxis = us-gaap_MaximumMember | 35.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_RangeAxis = us-gaap_MaximumMember | 35.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  | 35.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_RangeAxis = us-gaap_MaximumMember |
Consolidation less than wholly owned subsidiary parent ownership interest changes sale of interest percent by parent (in hundredths) |  |  |  |  |  | 1.00%usph_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesSaleOfInterestPercentByParent / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |  |
Non competition agreements [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Values assigned being amortized to expense equally over the respective estimated life |  |  |  |  |  |  |  | 6 years |  |  |  |  |  |
Non-Controlling Interest [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of separate transactions to purchase partnership interest |  |  |  |  | 4 usph_NumberOfSeparateTransactionsToPurchasePartnershipInterest / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = usph_RedeemableNonControllingInterestMember |  |  |  |  |  |  |  |  |
Number of Partnership in which Interest Acquired |  |  |  |  | 2 usph_NumberOfPartnershipInWhichInterestAcquired / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = usph_RedeemableNonControllingInterestMember |  |  |  |  |  |  |  |  |
Book value of purchase price |  |  |  |  | 3,000,000 usph_BusinessAcquisitionPurchasePriceAllocationNetBookValue / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = usph_RedeemableNonControllingInterestMember |  |  |  |  |  |  |  |  |
Purchase price for additional non controlling interest |  |  |  |  | 4,900,000 us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = usph_RedeemableNonControllingInterestMember |  |  |  |  |  |  |  |  |
Future tax benefits |  |  |  |  | 800,000 us-gaap_UnrecognizedTaxBenefits / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = usph_RedeemableNonControllingInterestMember |  |  |  |  |  |  |  |  |
Remaining purchase price |  |  |  |  | 1,900,000 usph_BusinessAcquisitionCostOfAcquiredEntityChargeFromAdditionalPaidUpCapital / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = usph_RedeemableNonControllingInterestMember |  |  |  |  |  |  |  |  |
Non-Controlling Interest [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of purchase of non controlling interest (in hundredths) |  |  |  |  | 10.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = usph_RedeemableNonControllingInterestMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |  |
Trade Names [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Values assigned being amortized to expense equally over the respective estimated life |  |  |  |  |  |  |  | 6 years |  |  |  |  |  |
Referral relationships [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Values assigned being amortized to expense equally over the respective estimated life |  |  |  |  |  |  |  | 4 years 7 months 6 days |  |  |  |  |  |
Referral relationships [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Values assigned being amortized to expense equally over the respective estimated life |  |  |  |  |  |  |  | 13 years |  |  |  |  |  |
April 2014 Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of purchase of non controlling interest (in hundredths) |  |  |  |  | 70.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_AprilTwoThousandFourteenAcquisitionMember |  |  |  |  |  |  |  |  |
Cash paid for acquisition of interest in clinic |  |  |  |  | 10,600,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = usph_AprilTwoThousandFourteenAcquisitionMember |  |  |  |  |  |  |  |  |
Seller notes issued for acquisition of interest in clinic |  |  |  |  | 400,000 usph_BusinessAcquisitionCostOfAcquiredEntityDebtIssued / us-gaap_BusinessAcquisitionAxis = usph_AprilTwoThousandFourteenAcquisitionMember |  |  |  |  |  |  |  |  |
Business acquisition number of installments to payment of purchase consideration |  |  |  |  | 2 usph_BusinessAcquisitionNumberOfInstallmentsToPaymentOfPurchaseConsideration / us-gaap_BusinessAcquisitionAxis = usph_AprilTwoThousandFourteenAcquisitionMember |  |  |  |  |  |  |  |  |
August 2014 Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of clinic practices acquired |  |  |  |  | 3 usph_NumberOfClinicAcquired / us-gaap_BusinessAcquisitionAxis = usph_AugustTwoThousandFourteenAcqusitionMember |  |  |  |  |  |  |  |  |
Percentage of purchase of non controlling interest (in hundredths) |  |  |  |  | 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_AugustTwoThousandFourteenAcqusitionMember |  |  |  |  |  |  |  |  |
Cash paid for acquisition of interest in clinic |  |  |  |  | 1,000,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = usph_AugustTwoThousandFourteenAcqusitionMember |  |  |  |  |  |  |  |  |
Seller notes issued for acquisition of interest in clinic |  |  |  |  | 595,000 usph_BusinessAcquisitionCostOfAcquiredEntityDebtIssued / us-gaap_BusinessAcquisitionAxis = usph_AugustTwoThousandFourteenAcqusitionMember |  |  |  |  |  |  |  |  |
February 2013 Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of purchase of non controlling interest (in hundredths) |  |  |  |  | 72.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_FebruaryTwoThousandThirteenAcquisitionMember | 72.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_FebruaryTwoThousandThirteenAcquisitionMember |  |  |  |  |  |  | 72.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_FebruaryTwoThousandThirteenAcquisitionMember |
Cash paid for acquisition of interest in clinic |  |  |  |  | 4,300,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = usph_FebruaryTwoThousandThirteenAcquisitionMember |  |  |  |  |  |  |  |  |
Seller notes issued for acquisition of interest in clinic |  |  |  |  | 400,000 usph_BusinessAcquisitionCostOfAcquiredEntityDebtIssued / us-gaap_BusinessAcquisitionAxis = usph_FebruaryTwoThousandThirteenAcquisitionMember |  |  |  |  |  |  |  |  |
Business acquisition number of installments to payment of purchase consideration |  |  |  |  | 2 usph_BusinessAcquisitionNumberOfInstallmentsToPaymentOfPurchaseConsideration / us-gaap_BusinessAcquisitionAxis = usph_FebruaryTwoThousandThirteenAcquisitionMember |  |  |  |  |  |  |  |  |
April 2013 Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of purchase of non controlling interest (in hundredths) |  |  |  |  | 50.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_AprilTwoThousandThirteenAcquisitionMember | 50.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_AprilTwoThousandThirteenAcquisitionMember |  |  |  |  |  |  | 50.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_AprilTwoThousandThirteenAcquisitionMember |
Cash paid for acquisition of interest in clinic |  |  |  |  | 2,400,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = usph_AprilTwoThousandThirteenAcquisitionMember |  |  |  |  |  |  |  |  |
Seller notes issued for acquisition of interest in clinic |  |  |  |  | 200,000 usph_BusinessAcquisitionCostOfAcquiredEntityDebtIssued / us-gaap_BusinessAcquisitionAxis = usph_AprilTwoThousandThirteenAcquisitionMember |  |  |  |  |  |  |  |  |
Business acquisition number of installments to payment of purchase consideration |  |  |  |  | 2 usph_BusinessAcquisitionNumberOfInstallmentsToPaymentOfPurchaseConsideration / us-gaap_BusinessAcquisitionAxis = usph_AprilTwoThousandThirteenAcquisitionMember |  |  |  |  |  |  |  |  |
May 2013 Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of purchase of non controlling interest (in hundredths) |  |  |  |  | 80.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_MayTwoThousandThirteenAcquisitionMember | 80.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_MayTwoThousandThirteenAcquisitionMember |  |  |  |  |  |  | 80.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_MayTwoThousandThirteenAcquisitionMember |
Cash paid for acquisition of interest in clinic |  |  |  |  | 3,600,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = usph_MayTwoThousandThirteenAcquisitionMember |  |  |  |  |  |  |  |  |
Seller notes issued for acquisition of interest in clinic |  |  |  |  | 200,000 usph_BusinessAcquisitionCostOfAcquiredEntityDebtIssued / us-gaap_BusinessAcquisitionAxis = usph_MayTwoThousandThirteenAcquisitionMember |  |  |  |  |  |  |  |  |
Business acquisition number of installments to payment of purchase consideration |  |  |  |  | 2 usph_BusinessAcquisitionNumberOfInstallmentsToPaymentOfPurchaseConsideration / us-gaap_BusinessAcquisitionAxis = usph_MayTwoThousandThirteenAcquisitionMember |  |  |  |  |  |  |  |  |
General Partner [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining proportion of July 2011 acquisition, the company owned (in hundredths) |  |  |  | 1.00%usph_SaleOfProportionOfInterestInAcquisitionToLimitedPartner / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_GeneralPartnerMember |  |  |  |  |  |  |  |  |  |
Limited Partner [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining proportion of July 2011 acquisition, the company owned (in hundredths) |  |  |  | 49.00%usph_SaleOfProportionOfInterestInAcquisitionToLimitedPartner / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember |  |  |  |  |  |  |  |  |  |
Texas Partnerships [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage (in hundredths) |  |  |  |  | 1.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = usph_TexasPartnershipsMember |  |  |  |  |  |  |  |  |
Limited partnership interest owned by USPT Ltd. (in hundredths) |  |  |  |  | 89.00%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = usph_TexasPartnershipsMember |  |  |  |  |  |  |  |  |
Texas Partnerships [Member] | Outpatient Physical and Occupational Therapy Clinics [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of clinic practices operated under existing partnership |  |  |  |  | 11 usph_NumberOfClinicOperatedUnderExistingPartnership / us-gaap_BusinessAcquisitionAxis = usph_PhysicalTherapyClinicsMember / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = usph_TexasPartnershipsMember |  |  |  |  |  |  |  |  |
Texas Partnerships [Member] | Industrial Client Locations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of clinic practices operated under existing partnership |  |  |  |  | 3 usph_NumberOfClinicOperatedUnderExistingPartnership / us-gaap_BusinessAcquisitionAxis = usph_IndustrialClientLocationsMember / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = usph_TexasPartnershipsMember |  |  |  |  |  |  |  |  |
May 2013 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition cost payable in two principal installments including accrued interest |  |  | 125,000 usph_BusinessAcquisitionPrincipalInstallmentsPayableAtCostOfAcquiredByEntityAtAccruedInterest / us-gaap_StatementScenarioAxis = usph_MayTwoThousandThirteenMember |  |  |  |  |  |  |  |  |  |  |
May 2014 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition cost payable in two principal installments including accrued interest |  |  | 125,000 usph_BusinessAcquisitionPrincipalInstallmentsPayableAtCostOfAcquiredByEntityAtAccruedInterest / us-gaap_StatementScenarioAxis = usph_MayTwoThousandFourteenMember |  |  |  |  |  | 100,000 usph_BusinessAcquisitionPrincipalInstallmentsPayableAtCostOfAcquiredByEntityAtAccruedInterest / us-gaap_StatementScenarioAxis = usph_MayTwoThousandFourteenMember |  |  |  |  |
April 2014 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition cost payable in two principal installments including accrued interest |  |  |  |  |  |  |  |  |  | 100,000 usph_BusinessAcquisitionPrincipalInstallmentsPayableAtCostOfAcquiredByEntityAtAccruedInterest / us-gaap_StatementScenarioAxis = usph_AprilTwoThousandFourteenMember |  |  |  |
April 2015 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition cost payable in two principal installments including accrued interest |  |  |  |  |  |  |  |  |  | 100,000 usph_BusinessAcquisitionPrincipalInstallmentsPayableAtCostOfAcquiredByEntityAtAccruedInterest / us-gaap_StatementScenarioAxis = usph_AprilTwoThousandFifteenMember | 200,000 usph_BusinessAcquisitionPrincipalInstallmentsPayableAtCostOfAcquiredByEntityAtAccruedInterest / us-gaap_StatementScenarioAxis = usph_AprilTwoThousandFifteenMember |  |  |
April 2016 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition cost payable in two principal installments including accrued interest |  |  |  |  |  |  |  |  |  |  | 200,000 usph_BusinessAcquisitionPrincipalInstallmentsPayableAtCostOfAcquiredByEntityAtAccruedInterest / us-gaap_StatementScenarioAxis = usph_AprilTwoThousandSixteenMember |  |  |
February 2014 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition cost payable in two principal installments including accrued interest |  |  |  |  |  |  |  |  |  |  |  | 200,000 usph_BusinessAcquisitionPrincipalInstallmentsPayableAtCostOfAcquiredByEntityAtAccruedInterest / us-gaap_StatementScenarioAxis = usph_FebruaryTwoThousandFourteenMember |  |
February 2015 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition cost payable in two principal installments including accrued interest |  |  |  |  |  |  |  |  |  |  |  | 200,000 usph_BusinessAcquisitionPrincipalInstallmentsPayableAtCostOfAcquiredByEntityAtAccruedInterest / us-gaap_StatementScenarioAxis = usph_FebruaryTwoThousandFifteenMember |  |
May 2015 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition cost payable in two principal installments including accrued interest |  |  |  |  |  |  |  |  | 100,000 usph_BusinessAcquisitionPrincipalInstallmentsPayableAtCostOfAcquiredByEntityAtAccruedInterest / us-gaap_StatementScenarioAxis = usph_MayTwoThousandFifteenMember |  |  |  |  |
December 2014 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition cost payable in two principal installments including accrued interest |  |  |  |  |  |  |  |  |  |  |  |  | 250,000 usph_BusinessAcquisitionPrincipalInstallmentsPayableAtCostOfAcquiredByEntityAtAccruedInterest / us-gaap_StatementScenarioAxis = usph_DecemberTwoThousandFourteenMember |
December 2015 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition cost payable in two principal installments including accrued interest |  |  |  |  |  |  |  |  |  |  |  |  | $ 250,000 usph_BusinessAcquisitionPrincipalInstallmentsPayableAtCostOfAcquiredByEntityAtAccruedInterest / us-gaap_StatementScenarioAxis = usph_DecemberTwoThousandFifteenMember |

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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition The net gains or losses recognized for each transaction with the acquiree that was recognized separately from the acquisition of assets and assumptions of liabilities in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(3) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition The revenues and gains recognized recorded for each transaction with the acquiree that is recognized separately from the acquisition of assets and assumptions of liabilities in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(3) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition Represents the purchase by the parent of an additional equity interest in a subsidiary during the period, thereby effecting a change in total (consolidated) equity attributable to the parent. The purchase of the additional equity interest represented by this element increases the parent's controlling interest in the subsidiary. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4M -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591554-111686 + 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 percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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- Definition Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash inflow associated with the deconsolidation of a previously consolidated subsidiary or the sale of investment in consolidated subsidiaries (generally greater than 50 percent). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The proceeds from the sale of an interest in a unit of partnership. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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