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COMMON STOCK (Details) (USD $)	0 Months Ended	1 Months Ended	3 Months Ended
	Mar. 31, 2009	Mar. 31, 2009	Mar. 31, 2015	Dec. 31, 2008
COMMON STOCK [Abstract]
Common stock authorized by the Board of Directors (in shares)				2,250,000us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Maximum percentage of repurchase of common stock (in hundredths)		10.00%usph_MaximumPercentageOfRepurchaseOfCommonStock
Repurchase of common stock (in shares)	1,200,000us-gaap_StockRepurchasedDuringPeriodShares	859,499us-gaap_StockRepurchasedDuringPeriodShares	0us-gaap_StockRepurchasedDuringPeriodShares
Bank credit agreement to permit share repurchases of common stock		$ 15,000,000usph_BankCreditAgreementToPermitShareRepurchasesOfCommonStock
Additional estimated shares (in shares)		315,700usph_AdditionalEstimatedRepurchaseOfCommonStock
Closing price		$ 47.50us-gaap_SharesIssuedPricePerShare

X

- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount per share or per unit of equity securities issued by non-development stage entity.

+ References

No definition available.

+ Details

Name:	us-gaap_SharesIssuedPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

+ Details

Name:	us-gaap_StockRepurchasedDuringPeriodShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

+ Details

Name:	us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Additional estimated repurchase of common stock during the period.

+ References

No definition available.

+ Details

Name:	usph_AdditionalEstimatedRepurchaseOfCommonStock
Namespace Prefix:	usph_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Bank credit agreement to permit share repurchases of common stock during the period.

+ References

No definition available.

+ Details

Name:	usph_BankCreditAgreementToPermitShareRepurchasesOfCommonStock
Namespace Prefix:	usph_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Maximum percentage of repurchase of common stock during the period.

+ References

No definition available.

+ Details

Name:	usph_MaximumPercentageOfRepurchaseOfCommonStock
Namespace Prefix:	usph_
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Balance Type:	na
Period Type:	instant