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

No definition available.

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Balance Type:	na
Period Type:	duration

- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
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- Definition

The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Paragraph 1
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- Definition

This element represents the fair value of the noncontrolling interest in the acquiree at the acquisition date.

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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- References

No definition available.

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- Definition

Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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- Definition

Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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Period Type:	instant

- Definition

Amount of assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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-Publisher FASB
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-Topic 210
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- Definition

The number of businesses acquired by the entity during the period.

+ References

No definition available.

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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- Definition

The amount of business acquisition cost of acquired entity debt issued on the date of acquisition.

+ References

No definition available.

+ Details

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- Definition

Business acquisition number of installments to payment of purchase consideration.

+ References

No definition available.

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- Definition

Amount of business acquisition principal installments payable at cost of acquired by entity at accrued interest.

+ References

No definition available.

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- Definition

Amount of net tangible asset acquired at the acquisition date.

+ References

No definition available.

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- Definition

Useful life of acquired finite-lived intangible assets in business combination, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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Data Type:	xbrli:durationItemType
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Period Type:	duration

- Definition

This element represents the fair value of the redeemable noncontrolling interest in the acquiree at the acquisition date.

+ References

No definition available.

+ Details

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- Definition

The amount of non-competition agreements recognized as of the acquisition date.

+ References

No definition available.

+ Details

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Namespace Prefix:	usph_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Amount of referral relationships at the acquisition date.

+ References

No definition available.

+ Details

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Namespace Prefix:	usph_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

The amount of tradename recognized as of the acquisition date.

+ References

No definition available.

+ Details

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Namespace Prefix:	usph_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- References

No definition available.

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- Definition

Represents number of acquired operation combined by the entity during the period.

+ References

No definition available.

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- Definition

Number of businesses merged during the period.

+ References

No definition available.

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Balance Type:	na
Period Type:	duration

- Definition

Number of clinics consolidated with the existing clinics 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

- Definition

Number of clinics operates as a satellite clinic with existing partnerships during the period.

+ References

No definition available.

+ Details

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- Definition

Refers to number of management contracts.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents number of subsidiaries of the entity acquired clinic practices 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

- Definition

Payments to acquire businesses total consideration.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage of combined business interest owned during the period.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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Period Type:	duration

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- Details

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Acquisitions of Businesses (Details)										12 Months Ended
Acquisitions of Businesses (Details)	Aug. 31, 2018 USD ($) Installment	Apr. 30, 2018 Business	Oct. 31, 2017 USD ($) Installment	Jun. 30, 2017 USD ($) Installment	May 31, 2017 USD ($) Installment	Mar. 23, 2017 USD ($)	Jan. 01, 2017 USD ($) Installment	Nov. 30, 2016 USD ($) Installment	Feb. 29, 2016 USD ($) Installment	Dec. 31, 2018 USD ($) Clinic Operation	Dec. 31, 2017 USD ($) Clinic Contract	Dec. 31, 2016 USD ($) Clinic Subsidiary
Business Combination, Description [Abstract]
Percentage of interest acquired											35.00%
Number of clinics \| Clinic										5	2	2
Number of acquired operations combined \| Operation										2
Number of management contracts \| Contract											2
Number of clinics consolidated with an existing clinic \| Clinic											1
Number of clinics that operate as a satellite clinic with existing partnerships \| Clinic											1
Cash paid, net of cash acquired										$ 16,367,000	$ 36,682,000	$ 23,623,000
Seller notes										950,000	2,150,000	1,000,000
Total consideration										17,317,000	38,832,000	24,623,000
Estimated fair value of net tangible assets acquired: [Abstract]
Total current assets										1,691,000	5,853,000	1,372,000
Total non-current assets										42,000	1,527,000	839,000
Total liabilities										(486,000)	(2,865,000)	(399,000)
Net tangible assets acquired										1,247,000	4,515,000	1,812,000
Referral relationships										1,879,000	4,250,000	4,919,000
Non-compete										386,000	660,000	847,000
Tradename										2,172,000	6,850,000	3,802,000
Goodwill										19,778,000	46,722,000	32,123,000
Fair value of non-controlling interest (classified as redeemable non-controlling interests)										(8,145,000)	(13,883,000)
Fair value of non-controlling interest (originally classified as mandatorily redeemable non-controlling interests)											(10,282,000)	(18,880,000)
Total consideration										$ 17,317,000	$ 38,832,000	$ 24,623,000
Minimum [Member]
Business Combination, Description [Abstract]
Percentage of interest acquired										5.50%		2.00%
Maximum [Member]
Business Combination, Description [Abstract]
Percentage of interest acquired										35.00%		35.00%
Referral Relationships [Member] \| Minimum [Member]
Business Combination, Description [Abstract]
Estimated useful lives of acquired intangibles										10 years 1 month 6 days	10 years 1 month 6 days
Referral Relationships [Member] \| Maximum [Member]
Business Combination, Description [Abstract]
Estimated useful lives of acquired intangibles										10 years 6 months 14 days	10 years 6 months 14 days
Non-compete Agreements [Member] \| Minimum [Member]
Business Combination, Description [Abstract]
Estimated useful lives of acquired intangibles										5 years 1 month 28 days	5 years 1 month 28 days
Non-compete Agreements [Member] \| Maximum [Member]
Business Combination, Description [Abstract]
Estimated useful lives of acquired intangibles										6 years	6 years
Tradenames [Member]
Business Combination, Description [Abstract]
Estimated useful lives of acquired intangibles										6 years
February 2017 [Member]
Business Combination, Description [Abstract]
Acquisition cost payable in two principal installments including accrued interest												$ 194,000
February 2018 [Member]
Business Combination, Description [Abstract]
Acquisition cost payable in two principal installments including accrued interest												194,000
Industrial Injury Prevention [Member]
Business Combination, Description [Abstract]
Percentage of interest acquired		65.00%				55.00%
Cash paid for acquisition of interest in clinic						$ 6,200,000
Number of businesses merged \| Business		2
Percentage of combined business interest owned		59.45%
Seller notes						$ 400,000
August 2018 Acquisition [Member]
Business Combination, Description [Abstract]
Acquisition date										Aug. 31, 2018
Percentage of interest acquired										70.00%
Number of clinics \| Clinic										4
Cash paid for acquisition of interest in clinic	$ 7,200,000
Business acquisition number of installments to payment of purchase consideration \| Installment	2
Seller notes	$ 400,000
August 2018 Acquisition [Member] \| August 2019 [Member]
Business Combination, Description [Abstract]
Acquisition cost payable in two principal installments including accrued interest	200,000
August 2018 Acquisition [Member] \| August 2020 [Member]
Business Combination, Description [Abstract]
Acquisition cost payable in two principal installments including accrued interest	$ 200,000
January 2017 Acquisition [Member]
Business Combination, Description [Abstract]
Acquisition date											Jan. 01, 2017
Percentage of interest acquired											70.00%
Number of clinics \| Clinic											17
Cash paid for acquisition of interest in clinic							$ 10,700,000
Business acquisition number of installments to payment of purchase consideration \| Installment							2
Seller notes												$ 500,000
January 2017 Acquisition [Member] \| January 2018 [Member]
Business Combination, Description [Abstract]
Acquisition cost payable in two principal installments including accrued interest							$ 250,000
January 2017 Acquisition [Member] \| January 2019 [Member]
Business Combination, Description [Abstract]
Acquisition cost payable in two principal installments including accrued interest							$ 250,000
May 2017 Acquisition [Member]
Business Combination, Description [Abstract]
Acquisition date											May 31, 2017
Percentage of interest acquired											70.00%
Number of clinics \| Clinic											4
Cash paid for acquisition of interest in clinic					$ 2,300,000
Business acquisition number of installments to payment of purchase consideration \| Installment					2
Seller notes					$ 250,000
May 2017 Acquisition [Member] \| May 2018 [Member]
Business Combination, Description [Abstract]
Acquisition cost payable in two principal installments including accrued interest					125,000
May 2017 Acquisition [Member] \| May 2019 [Member]
Business Combination, Description [Abstract]
Acquisition cost payable in two principal installments including accrued interest					$ 125,000
June 2017 Acquisition [Member]
Business Combination, Description [Abstract]
Acquisition date											Jun. 30, 2017
Percentage of interest acquired											60.00%
Number of clinics \| Clinic											9
Cash paid for acquisition of interest in clinic				$ 15,800,000
Business acquisition number of installments to payment of purchase consideration \| Installment				2
Seller notes				$ 500,000
June 2017 Acquisition [Member] \| June 2018 [Member]
Business Combination, Description [Abstract]
Acquisition cost payable in two principal installments including accrued interest				250,000
June 2017 Acquisition [Member] \| June 2019 [Member]
Business Combination, Description [Abstract]
Acquisition cost payable in two principal installments including accrued interest				$ 250,000
October 2017 Acquisition [Member]
Business Combination, Description [Abstract]
Acquisition date											Oct. 31, 2017
Percentage of interest acquired											70.00%
Number of clinics \| Clinic											9
Cash paid for acquisition of interest in clinic			$ 4,000,000
Business acquisition number of installments to payment of purchase consideration \| Installment			2
Seller notes			$ 500,000
October 2017 Acquisition [Member] \| October 2018 [Member]
Business Combination, Description [Abstract]
Acquisition cost payable in two principal installments including accrued interest			250,000
October 2017 Acquisition [Member] \| October 2019 [Member]
Business Combination, Description [Abstract]
Acquisition cost payable in two principal installments including accrued interest			$ 250,000
February 2016 Acquisition [Member]
Business Combination, Description [Abstract]
Acquisition date												Feb. 29, 2016
Percentage of interest acquired												55.00%
Number of clinics \| Clinic												8
Cash paid for acquisition of interest in clinic									$ 13,200,000
Business acquisition number of installments to payment of purchase consideration \| Installment									2
Seller notes									$ 500,000
February 2016 Acquisition [Member] \| February 2017 [Member]
Business Combination, Description [Abstract]
Acquisition cost payable in two principal installments including accrued interest									250,000
February 2016 Acquisition [Member] \| February 2018 [Member]
Business Combination, Description [Abstract]
Acquisition cost payable in two principal installments including accrued interest									$ 250,000
November 2016 Acquisition [Member]
Business Combination, Description [Abstract]
Acquisition date												Nov. 30, 2016
Percentage of interest acquired												60.00%
Number of clinics \| Clinic												12
Cash paid for acquisition of interest in clinic								$ 11,000,000
Business acquisition number of installments to payment of purchase consideration \| Installment								2
Seller notes								$ 500,000
November 2016 Acquisition [Member] \| November 2017 [Member]
Business Combination, Description [Abstract]
Acquisition cost payable in two principal installments including accrued interest								250,000
November 2016 Acquisition [Member] \| November 2018 [Member]
Business Combination, Description [Abstract]
Acquisition cost payable in two principal installments including accrued interest								$ 250,000
Acquisition of Single Clinic Practice [Member]
Business Combination, Description [Abstract]
Aggregate purchase price for the acquired clinic practices												$ 75,000
Number of subsidiaries acquired clinic practices \| Subsidiary												2
Acquisition of Five Clinic Practices [Member]
Business Combination, Description [Abstract]
Number of clinics \| Clinic										5
Cash paid for acquisition of interest in clinic										$ 1,000,000
Aggregate purchase price for the acquired clinic practices										850,000
Seller notes										$ 150,000,000,000
Acquisition of Five Clinic Practices [Member] \| August 2019 [Member]
Business Combination, Description [Abstract]
Percentage of interest accrued										4.50%