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Commitments and Contingencies (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Commitments and Contingencies (Additional Textual) [Abstract]
Rent expense	$ 20.8	$ 19.4	$ 16.8
Renewal period of employment agreements	1 year
Agreements expire period	Dec. 31, 2014
Minimum notice period	12 months
Future compensation - 2013	17.4
Future compensation - 2014 through 2017	$ 5.9
Maximum [Member]
Commitments and Contingencies (Textual) [Abstract]
Operating leases renewal period	5 years
Minimum [Member]
Commitments and Contingencies (Textual) [Abstract]
Operating leases renewal period	1 year
Executive Officers [Member]
Commitments and Contingencies (Textual) [Abstract]
Outstanding employment agreements with number of Officers	3

X

- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	usph_CommitmentsAndContingenciesAdditionalTextualAbstract
Namespace Prefix:	usph_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	usph_CommitmentsAndContingenciesTextualAbstract
Namespace Prefix:	usph_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Employee compensation future payment due next fiscal year.

+ References

No definition available.

+ Details

Name:	usph_EmployeeCompensationFuturePaymentDueNextFiscalYear
Namespace Prefix:	usph_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Employee compensation future payment due next fiscal year thereafter.

+ References

No definition available.

+ Details

Name:	usph_EmployeeCompensationFuturePaymentDueNextFiscalYearThereafter
Namespace Prefix:	usph_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Employment agreements expiration date.

+ References

No definition available.

+ Details

Name:	usph_EmploymentAgreementsExpirationDate
Namespace Prefix:	usph_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Notice period for renewal of employment agreements.

+ References

No definition available.

+ Details

Name:	usph_NoticePeriodForRenewalOfEmploymentAgreements
Namespace Prefix:	usph_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of employees under employee agreement.

+ References

No definition available.

+ Details

Name:	usph_NumberOfEmployeesUnderEmployeeAgreement
Namespace Prefix:	usph_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Operating leases renewal period.

+ References

No definition available.

+ Details

Name:	usph_OperatingLeasesRenewalPeriod
Namespace Prefix:	usph_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Renewal period for employment.

+ References

No definition available.

+ Details

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Namespace Prefix:	usph_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration