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Acquisitions of Businesses and Non-Controlling Interests - Schedule of Multi Clinic Acquisition (Details)	12 Months Ended
	Dec. 31, 2014 Clinic	Dec. 31, 2013 Clinic	Dec. 31, 2012 Clinic	Dec. 13, 2013	Dec. 09, 2013	May 22, 2012
Business Acquisition [Line Items]
Percentage of interest acquired (in hundredths)				90.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired	60.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired	70.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
April 2014 Acquisition [Member]
Business Acquisition [Line Items]
Acquisition date	Apr. 30, 2014
Percentage of interest acquired (in hundredths)	70.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_AprilTwoThousandFourteenAcquisitionMember
Number of Clinics	13us-gaap_NumberOfBusinessesAcquired / us-gaap_BusinessAcquisitionAxis = usph_AprilTwoThousandFourteenAcquisitionMember
August 2014 Acquisition [Member]
Business Acquisition [Line Items]
Acquisition date	Aug. 01, 2014
Percentage of interest acquired (in hundredths)	100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_AugustTwoThousandFourteenAcqusitionMember
Number of Clinics	3us-gaap_NumberOfBusinessesAcquired / us-gaap_BusinessAcquisitionAxis = usph_AugustTwoThousandFourteenAcqusitionMember
February 2013 Acquisition [Member]
Business Acquisition [Line Items]
Acquisition date	Feb. 28, 2013	Feb. 28, 2013
Percentage of interest acquired (in hundredths)	72.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_FebruaryTwoThousandThirteenAcquisitionMember	72.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_FebruaryTwoThousandThirteenAcquisitionMember
Number of Clinics	9us-gaap_NumberOfBusinessesAcquired / us-gaap_BusinessAcquisitionAxis = usph_FebruaryTwoThousandThirteenAcquisitionMember	9us-gaap_NumberOfBusinessesAcquired / us-gaap_BusinessAcquisitionAxis = usph_FebruaryTwoThousandThirteenAcquisitionMember
April 2013 Acquisition [Member]
Business Acquisition [Line Items]
Acquisition date	Apr. 30, 2013	Apr. 30, 2013
Percentage of interest acquired (in hundredths)	50.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_AprilTwoThousandThirteenAcquisitionMember	50.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_AprilTwoThousandThirteenAcquisitionMember
Number of Clinics	5us-gaap_NumberOfBusinessesAcquired / us-gaap_BusinessAcquisitionAxis = usph_AprilTwoThousandThirteenAcquisitionMember	5us-gaap_NumberOfBusinessesAcquired / us-gaap_BusinessAcquisitionAxis = usph_AprilTwoThousandThirteenAcquisitionMember
May 2013 Acquisition [Member]
Business Acquisition [Line Items]
Acquisition date	May 24, 2013	May 24, 2013
Percentage of interest acquired (in hundredths)	80.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_MayTwoThousandThirteenAcquisitionMember	80.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_MayTwoThousandThirteenAcquisitionMember
Number of Clinics	5us-gaap_NumberOfBusinessesAcquired / us-gaap_BusinessAcquisitionAxis = usph_MayTwoThousandThirteenAcquisitionMember	5us-gaap_NumberOfBusinessesAcquired / us-gaap_BusinessAcquisitionAxis = usph_MayTwoThousandThirteenAcquisitionMember
December 9, 2013 Acquisition [Member]
Business Acquisition [Line Items]
Acquisition date	Dec. 09, 2013	Dec. 09, 2013
Percentage of interest acquired (in hundredths)	60.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_DecemberNineTwoThousandThirteenAcquisitionMember	60.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_DecemberNineTwoThousandThirteenAcquisitionMember
Number of Clinics	12us-gaap_NumberOfBusinessesAcquired / us-gaap_BusinessAcquisitionAxis = usph_DecemberNineTwoThousandThirteenAcquisitionMember	12us-gaap_NumberOfBusinessesAcquired / us-gaap_BusinessAcquisitionAxis = usph_DecemberNineTwoThousandThirteenAcquisitionMember
December 13, 2013 Acquisition [Member]
Business Acquisition [Line Items]
Acquisition date	Dec. 13, 2013	Dec. 13, 2013
Percentage of interest acquired (in hundredths)	90.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_DecemberThirteenTwoThousandThirteenAcquisitionMember	90.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_DecemberThirteenTwoThousandThirteenAcquisitionMember
Number of Clinics	11us-gaap_NumberOfBusinessesAcquired / us-gaap_BusinessAcquisitionAxis = usph_DecemberThirteenTwoThousandThirteenAcquisitionMember	11us-gaap_NumberOfBusinessesAcquired / us-gaap_BusinessAcquisitionAxis = usph_DecemberThirteenTwoThousandThirteenAcquisitionMember
May 2012 Acquisition [Member]
Business Acquisition [Line Items]
Acquisition date			May 22, 2012
Percentage of interest acquired (in hundredths)			70.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_MayTwoThousandTwelveAcquisitionMember
Number of Clinics			7us-gaap_NumberOfBusinessesAcquired / us-gaap_BusinessAcquisitionAxis = usph_MayTwoThousandTwelveAcquisitionMember

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+ References

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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

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