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Notes Payable - Summary of Notes Payable (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	May 22, 2012
Debt Instrument [Line Items]
Payments/Long term debt, Total	$ 35,617us-gaap_LongTermDebt	$ 41,475us-gaap_LongTermDebt
Less current portion	(883)us-gaap_LongTermDebtCurrent	(825)us-gaap_LongTermDebtCurrent
Long term portion	34,734us-gaap_LongTermDebtNoncurrent	40,650us-gaap_LongTermDebtNoncurrent
Percentage of interest accrued (in hundredths)			3.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
Credit Facility [Member]
Debt Instrument [Line Items]
Payments/Long term debt, Total	34,500us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = usph_CreditFacilityMember	40,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = usph_CreditFacilityMember
Average effective interest rate (in hundredths)	2.40%us-gaap_LineOfCreditFacilityInterestRateDuringPeriod / us-gaap_DebtInstrumentAxis = usph_CreditFacilityMember
3.25 % notes payable due in next year [Member]
Debt Instrument [Line Items]
Payments/Long term debt, Total	1,117us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = usph_PromissoryNotesMember	1,475us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = usph_PromissoryNotesMember
Annual installments	$ 883us-gaap_DebtInstrumentAnnualPrincipalPayment / us-gaap_DebtInstrumentAxis = usph_PromissoryNotesMember
Percentage of interest accrued (in hundredths)	3.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = usph_PromissoryNotesMember

X

- Definition

Amount of the total principal payments made during the annual reporting period.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

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X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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X

- Definition

The effective interest rate during the reporting period.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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- Definition

Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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