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Selected Quarterly Financial Data (Unaudited) - Restated Consolidated Statement of Cash Flows (Details) - USD ($) $ in Thousands		3 Months Ended												6 Months Ended				9 Months Ended				12 Months Ended
		Sep. 30, 2016		Jun. 30, 2016		Mar. 31, 2016		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Jun. 30, 2016		Jun. 30, 2015		Sep. 30, 2016		Sep. 30, 2015		Dec. 31, 2016	Dec. 31, 2015		Dec. 31, 2014
OPERATING ACTIVITIES
Net income including non-controlling interests		$ 6,134	[1]	$ 7,671	[1]	$ 5,953	[1]	$ 6,974	[1]	$ 7,957	[1]	$ 5,293	[1]	$ 13,624	[1]	$ 13,250	[1]	$ 19,758	[1]	$ 20,224	[1]	$ 26,268	$ 26,489	[1]	$ 25,314	[1]
Adjustments to reconcile net income including non-controlling interests to net cash provided by operating activities: [Abstract]
Depreciation and amortization						2,091	[1]					1,807	[1]	4,158	[1]	3,674	[1]	6,210	[1]	5,656	[1]	8,779	7,952	[1]	6,740	[1]
Provision for doubtful accounts		917	[1]	956	[1]	1,089	[1]	1,067	[1]	1,062	[1]	990	[1]	2,045	[1]	2,052	[1]	2,962	[1]	3,119	[1]	4,040	4,170	[1]	4,112	[1]
Equity-based awards compensation expense						1,221	[1]					991	[1]	2,484	[1]	2,206	[1]	3,748	[1]	3,368	[1]	4,962	4,491	[1]	3,363	[1]
Loss on sale of fixed assets						(19)	[1]					17	[1]	0	[1]	(13)	[1]	31	[1]	3	[1]	152	84	[1]	35	[1]
Excess tax benefit from equity-based awards						142	[1]					(271)	[1]	0	[1]	(430)	[1]	0	[1]	(816)	[1]	0	(947)	[1]	(948)	[1]
Deferred income tax						1,823	[1]					473	[1]	2,503	[1]	2,056	[1]	3,238	[1]	2,918	[1]	2,979	5,953	[1]	5,106	[1]
Other						0	[1]					34	[1]	0	[1]	111	[1]	0	[1]	180	[1]	0	180	[1]	135	[1]
Changes in operating assets and liabilities: [Abstract]
Increase in patient accounts receivable						(2,185)	[1]					(2,185)	[1]	(2,449)	[1]	(2,880)	[1]	(2,548)	[1]	(4,148)	[1]	(3,275)	(5,519)	[1]	(5,388)	[1]
(Increase) decrease in accounts receivable - other						43	[1]					125	[1]	53	[1]	165	[1]	116	[1]	(145)	[1]	(400)	(852)	[1]	341	[1]
(Increase) decrease in other assets						(2,282)	[1]					106	[1]	(2,443)	[1]	(13)	[1]	(4,979)	[1]	(1,485)	[1]	(1,399)	(1,375)	[1]	1,155	[1]
Increase (decrease) in accounts payable and accrued expenses						3,392	[1]					(5,976)	[1]	6,603	[1]	(3,958)	[1]	3,582	[1]	(3,766)	[1]	2,994	(7,011)	[1]	1,868	[1]
Increase (decrease) in mandatorily redeemable non-controlling interests						2,578	[1]					406	[1]	4,028	[1]	90	[1]	5,372	[1]	683	[1]	5,598	2,509	[1]	2,936	[1]
(Decrease) increase in other liabilities						365	[1]					665	[1]	447	[1]	927	[1]	708	[1]	380	[1]	352	1,396	[1]	(3,378)	[1]
Net cash provided by operating activities						14,211	[1]					2,475	[1]	31,053	[1]	17,237	[1]	38,198	[1]	26,171	[1]	51,050	37,520	[1]	41,391	[1]
INVESTING ACTIVITIES [Abstract]
Purchase of fixed assets						(1,738)	[1]					(1,419)	[1]	(3,453)	[1]	(2,873)	[1]	(5,620)	[1]	(4,690)	[1]	(8,260)	(6,263)	[1]	(5,167)	[1]
Purchase of businesses, net of cash acquired						(12,899)	[1]					(6,445)	[1]	(12,958)	[1]	(14,467)	[1]	(12,958)	[1]	(14,434)	[1]	(23,623)	(18,965)	[1]	(12,270)	[1]
Acquisitions of non-controlling interests						(388)	[1]					(359)	[1]	(250)	[1]	(968)	[1]	(664)	[1]	(942)	[1]	(670)	(968)	[1]	(227)	[1]
Proceeds on sale of fixed assets, net						42	[1]					8	[1]	42	[1]	72	[1]	42	[1]	71	[1]	61	71	[1]	47	[1]
Net cash used in investing activities						(14,983)	[1]					(8,215)	[1]	(16,619)	[1]	(18,236)	[1]	(19,200)	[1]	(19,995)	[1]	(32,492)	(26,125)	[1]	(17,617)	[1]
FINANCING ACTIVITIES [Abstract]
Distributions to non-controlling interests						(1,113)	[1]					(1,045)	[1]	(2,893)	[1]	(2,904)	[1]	(4,441)	[1]	(4,148)	[1]	(5,718)	(5,892)	[1]	(5,963)	[1]
Cash dividends to shareholders - funded						(2,125)	[1]							(4,254)	[1]	(3,723)	[1]	(6,382)	[1]	(5,586)	[1]	(8,510)	(7,449)	[1]	(5,873)	[1]
Proceeds from revolving line of credit						49,000	[1]					34,000	[1]	93,000	[1]	51,000	[1]	128,000	[1]	75,000	[1]	168,000	103,000	[1]	134,300	[1]
Payments on revolving line of credit						(40,500)	[1]					(27,000)	[1]	(94,500)	[1]	(44,500)	[1]	(136,000)	[1]	(63,500)	[1]	(166,000)	(93,500)	[1]	(139,800)	[1]
Payments to settle mandatorily redeemable non-controlling interests						(1,136)	[1]							(1,136)	[1]			(1,136)	[1]	(1,860)	[1]	(1,262)	(6,115)	[1]	(5,233)	[1]
Principal payments on notes payable						(250)	[1]					(200)	[1]	(533)	[1]	(608)	[1]	(592)	[1]	(616)	[1]	(800)	(884)	[1]	(825)	[1]
Tax benefit from equity-based awards						323	[1]					271	[1]	556	[1]	430	[1]	798	[1]	816	[1]	0	947	[1]	948	[1]
Other						1	[1]							1	[1]	5	[1]	1	[1]	5	[1]	1	5	[1]	45	[1]
Net cash (used in) provided by financing activities						4,200	[1]					6,026	[1]	(9,759)	[1]	(300)	[1]	(19,752)	[1]	111	[1]	(14,289)	(9,888)	[1]	(22,401)	[1]
Net increase in cash and cash equivalents						3,428	[1]					286	[1]	4,675	[1]	(1,299)	[1]	(754)	[1]	6,287	[1]	4,269	1,507	[1]	1,373	[1]
Cash and cash equivalents - beginning of period	[1]	20,453		19,206		15,778		12,972		14,557		14,271		15,778		14,271		15,778		14,271		15,778	14,271		12,898
Cash and cash equivalents - end of period		15,024	[1]	20,453	[1]	19,206	[1]	20,558	[1]	12,972	[1]	14,557	[1]	20,453	[1]	12,972	[1]	15,024	[1]	20,558	[1]	20,047	15,778	[1]	14,271	[1]
Cash paid during the period for: [Abstract]
Income taxes						2,265	[1]					1,275	[1]	5,513	[1]	3,835	[1]	10,051	[1]	5,659	[1]	10,584	7,779	[1]	9,253	[1]
Interest						248	[1]					235	[1]	512	[1]	460	[1]	770	[1]	616	[1]	784	884	[1]	1,103	[1]
Non-cash investing and financing transactions during the period: [Abstract]
Purchase of business - seller financing portion						500	[1]					500	[1]	500	[1]	1,350	[1]	500	[1]	1,350	[1]	1,000	1,800	[1]	400	[1]
Acquisition of noncontrolling interest - seller financing portion						388	[1]							388	[1]			388	[1]	0	[1]	387	0	[1]	0	[1]
Payment to settle redeemable non-controlling interest - financing portion						126	[1]							126	[1]			126	[1]	1,240	[1]	127	3,077	[1]	67	[1]
Revaluation of mandatorily redeemable non-controlling interests	[1]					2,191						244		0		196		6,056		697
Receivable from sale of non-controlling interests														(148)	[1]			(148)	[1]			(138)	0	[1]	0	[1]
As Reported [Member]
OPERATING ACTIVITIES
Net income including non-controlling interests		7,972		10,060		7,680		8,064		9,117		6,151		17,740		15,268		25,712		23,332			31,691		30,424
Adjustments to reconcile net income including non-controlling interests to net cash provided by operating activities: [Abstract]
Depreciation and amortization						2,091						1,807		4,158		3,674		6,210		5,656
Provision for doubtful accounts		917		956		1,089		1,067		1,062		990		2,045		2,052		2,962		3,119
Equity-based awards compensation expense						1,221						991		2,484		2,206		3,748		3,368
Loss on sale of fixed assets						(19)						17		0		(13)		31		3
Excess tax benefit from equity-based awards						(323)						(271)		(556)		(430)		(798)		(816)
Deferred income tax						2,709						565		4,170		2,130		5,688		3,181			7,001		6,275
Other						0						34		0		111		0		180
Changes in operating assets and liabilities: [Abstract]
Increase in patient accounts receivable						(2,185)						(2,185)		(2,449)		(2,880)		(2,548)		(4,148)
(Increase) decrease in accounts receivable - other						43						125		53		165		116		(145)
(Increase) decrease in other assets						(2,282)						106		(2,443)		(13)		(4,979)		(1,485)			(1,477)		(2,493)
Increase (decrease) in accounts payable and accrued expenses						4,322						(5,976)		7,715		(3,958)		5,178		(3,766)			(7,013)
Increase (decrease) in mandatorily redeemable non-controlling interests						0						0		0		0		0		0			0		0
(Decrease) increase in other liabilities						365						665		447		927		708		380			1,482		730
Net cash provided by operating activities						14,711						3,019		33,364		19,239		42,028		28,859			41,243		45,194
INVESTING ACTIVITIES [Abstract]
Purchase of fixed assets						(1,738)						(1,419)		(3,453)		(2,873)		(5,620)		(4,690)
Purchase of businesses, net of cash acquired						(12,899)						(6,445)		(12,958)		(14,467)		(12,958)		(14,434)
Acquisitions of non-controlling interests						(1,524)						(359)		(1,386)		(968)		(1,800)		(2,802)
Proceeds on sale of fixed assets, net						42						8		42		72		42		71
Net cash used in investing activities						(16,119)						(8,215)		(17,755)		(18,236)		(20,336)		(21,855)			(32,240)		(22,880)
FINANCING ACTIVITIES [Abstract]
Distributions to non-controlling interests						(1,613)						(1,589)		(5,204)		(4,906)		(8,271)		(6,836)			0		0
Cash dividends to shareholders - funded						(2,125)								(4,254)		(3,723)		(6,382)		(5,586)
Proceeds from revolving line of credit						49,000						34,000		93,000		51,000		128,000		75,000
Payments on revolving line of credit						(40,500)						(27,000)		(94,500)		(44,500)		(136,000)		(63,500)
Payments to settle mandatorily redeemable non-controlling interests						0								0				0		0			0		0
Principal payments on notes payable						(250)						(200)		(533)		(608)		(592)		(616)
Tax benefit from equity-based awards						323						271		556		430		798		816
Other						1								1		5		1		5			22		222
Net cash (used in) provided by financing activities						4,836						5,482		(10,934)		(2,302)		(22,446)		(717)			(7,496)		(20,941)
Net increase in cash and cash equivalents						3,428						286		4,675		(1,299)		(754)		6,287
Cash and cash equivalents - beginning of period		20,453		19,206		15,778		12,972		14,557		14,271		15,778		14,271		15,778		14,271		15,778	14,271
Cash and cash equivalents - end of period		15,024		20,453		19,206		20,558		12,972		14,557		20,453		12,972		15,024		20,558			15,778		14,271
Cash paid during the period for: [Abstract]
Income taxes						2,265						1,275		5,513		3,835		10,051		5,659
Interest						248						235		512		460		770		616
Non-cash investing and financing transactions during the period: [Abstract]
Purchase of business - seller financing portion						500						500		500		1,350		500		1,350
Acquisition of noncontrolling interest - seller financing portion						514								514				514		1,240
Payment to settle redeemable non-controlling interest - financing portion						0								0				0		0
Revaluation of mandatorily redeemable non-controlling interests						0						0		0		627		0		627
Receivable from sale of non-controlling interests														(148)				(148)
Adjustment [Member]
OPERATING ACTIVITIES
Net income including non-controlling interests		(1,838)		(2,389)		(1,727)		(1,090)		(1,160)		(858)		(4,116)		(2,018)		(5,954)		(3,108)			(5,202)		(5,110)
Adjustments to reconcile net income including non-controlling interests to net cash provided by operating activities: [Abstract]
Depreciation and amortization						0						0		0		0		0		0
Provision for doubtful accounts		0		0		0		0		0		0		0		0		0		0
Equity-based awards compensation expense						0						0		0		0		0		0
Loss on sale of fixed assets						0						0		0		0		0		0
Excess tax benefit from equity-based awards						465						0		556		0		798		0
Deferred income tax						(886)						(92)		(1,667)		(74)		(2,450)		(263)			(1,048)		(1,169)
Other						0						0		0		0		0		0
Changes in operating assets and liabilities: [Abstract]
Increase in patient accounts receivable						0						0		0		0		0		0
(Increase) decrease in accounts receivable - other						0						0		0		0		0		0
(Increase) decrease in other assets						0						0		0		0		0		0			102		3,648
Increase (decrease) in accounts payable and accrued expenses						(930)						0		(1,112)		0		(1,596)		0			2
Increase (decrease) in mandatorily redeemable non-controlling interests						2,578						406		4,028		90		5,372		683			2,509		2,936
(Decrease) increase in other liabilities						0						0		0		0		0		0			(86)		(4,108)
Net cash provided by operating activities						(500)						(544)		(2,311)		(2,002)		(3,830)		(2,688)			(3,723)		(3,803)
INVESTING ACTIVITIES [Abstract]
Purchase of fixed assets						0						0		0		0		0		0
Purchase of businesses, net of cash acquired						0						0		0		0		0		0
Acquisitions of non-controlling interests						1,136						0		1,136		0		1,136		1,860
Proceeds on sale of fixed assets, net						0						0		0		0		0		0
Net cash used in investing activities						1,136						0		1,136		0		1,136		1,860			6,115		5,263
FINANCING ACTIVITIES [Abstract]
Distributions to non-controlling interests						500						544		2,311		2,002		3,830		2,688			(5,892)		(5,963)
Cash dividends to shareholders - funded						0								0		0		0		0
Proceeds from revolving line of credit						0						0		0		0		0		0
Payments on revolving line of credit						0						0		0		0		0		0
Payments to settle mandatorily redeemable non-controlling interests						(1,136)								(1,136)				(1,136)		(1,860)			(6,115)		(5,233)
Principal payments on notes payable						0						0		0		0		0		0
Tax benefit from equity-based awards						0						0		0		0		0		0
Other						0								0		0		0		0			(17)		(177)
Net cash (used in) provided by financing activities						(636)						544		1,175		2,002		2,694		828			(2,392)		(1,460)
Net increase in cash and cash equivalents						0						0		0		0		0		0
Cash and cash equivalents - beginning of period		0		0		0		0		0		0		0		0		0		0		$ 0	0
Cash and cash equivalents - end of period		$ 0		$ 0		$ 0		$ 0		$ 0		$ 0		$ 0		$ 0		$ 0		$ 0			$ 0		$ 0
[1] as restated

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Other cash or noncash adjustments to reconcile net income to cash provided by (used in) operating activities that are not separately disclosed in the statement of cash flows (for example, cash received or cash paid during the current period for miscellaneous operating activities, net change during the reporting period in other assets or other liabilities).

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- Definition

Amount of increase (decrease) in mandatorily redeemable non-controlling interests.

+ References

No definition available.

+ Details

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Namespace Prefix:	usph_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of payment to settle redeemable non-controlling interest related to financing portion during the period.

+ References

No definition available.

+ Details

Name:	usph_PaymentToSettleRedeemableNonControllingInterestFinancingPortion
Namespace Prefix:	usph_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Purchase of business - seller financing portion in noncash investing or financing activities.

+ References

No definition available.

+ Details

Name:	usph_PurchaseOfBusinessSellerFinancingPortion
Namespace Prefix:	usph_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Refers to amount of noncontrolling interest receivable from sale by an entity during the period.

+ References

No definition available.

+ Details

Name:	usph_ReceivableFromSaleOfNoncontrollingInterest
Namespace Prefix:	usph_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Revaluation of redeemable non-controlling interests in noncash investing or financing activities.

+ References

No definition available.

+ Details

Name:	usph_RevaluationOfRedeemableNonControllingInterests
Namespace Prefix:	usph_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioPreviouslyReportedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_RestatementAdjustmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: