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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Schedule of Clinic Acquisition (Details)	3 Months Ended
	Mar. 31, 2015 Clinic
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
January 2015 Acquisition [Member]
Business Acquisition [Line Items]
Acquisition date	Jan. 31, 2015
Percentage of interest acquired (in hundredths)	60.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = usph_JanuaryTwoThousandFifteenAcquisitionMember
Number of Clinics	9us-gaap_NumberOfBusinessesAcquired / us-gaap_BusinessAcquisitionAxis = usph_JanuaryTwoThousandFifteenAcquisitionMember

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- Definition

Date when the business acquisition agreement was executed, in CCYY-MM-DD format.

+ 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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