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Commitments and Contingencies - Additional Information (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Operating Leased Assets [Line Items] |  |  |
Rent expense | $ 25.6 us-gaap_OperatingLeasesRentExpenseNet | $ 22.0 us-gaap_OperatingLeasesRentExpenseNet | $ 20.8 us-gaap_OperatingLeasesRentExpenseNet
Renewal period of employment agreements | 1 year |  |
Expiration date | Dec. 31, 2016 |  |
Minimum notice period required for termination of employment agreement | 12 months |  |
Future compensation - 2015 | 24.3 usph_EmployeeCompensationFuturePaymentDueNextFiscalYear |  |
Future compensation - 2016 through 2019 | $ 8.9 usph_EmployeeCompensationFuturePaymentDueNextFiscalYearThereafter |  |
Executive Officer [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Number of officers with the company had employee agreement | 3 usph_NumberOfEmployeesCoveredUnderEmployeeAgreement / us-gaap_TitleOfIndividualAxis = us-gaap_ExecutiveOfficerMember |  |
Minimum [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Operating leases renewal period | 1 year |  |
Maximum [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Operating leases renewal period | 5 years |  |

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- Details
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Data Type: | xbrli:stringItemType
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Period Type: | duration

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- 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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- Definition Amount of required minimum payments for employee agreements in excess of one year due in the next fiscal year following the latest fiscal year. + References No definition available. + Details
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- Definition Amount of required minimum payments for employee agreements in excess of one year due after next fiscal year following the latest fiscal year. + References No definition available. + Details
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Namespace Prefix: | usph_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Expiration date of the employment agreements. + References No definition available. + Details
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Namespace Prefix: | usph_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- Definition Notice period required for termination of employment agreement. + References No definition available. + Details
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Namespace Prefix: | usph_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of employees covered under employee agreement during the period. + References No definition available. + Details
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Namespace Prefix: | usph_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Renewal period for operating leases. + References No definition available. + Details
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Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Employment agreement renewal period. + References No definition available. + Details
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Namespace Prefix: | usph_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
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Period Type: |

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- Details
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Namespace Prefix: |
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Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |