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Acquisitions of Businesses and Non-Controlling Interests - Additional Information (Detail) (USD $) | 0 Months Ended | 1 Months Ended | 12 Months Ended |  |  |  | 12 Months Ended |  | 12 Months Ended |  | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 0 Months Ended
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Dec. 13, 2013 Installment | Dec. 09, 2013 | Jul. 31, 2012 | May 31, 2012 | Apr. 30, 2012 | Nov. 30, 2011 | Dec. 31, 2013 Clinic Partnership Transactions Installment | Dec. 31, 2012 PartnershipUnit Clinic Transactions Partnership Installment | Dec. 31, 2011 | May 22, 2012 | Jul. 31, 2011 Installment | Jun. 30, 2011 Installment | Dec. 31, 2012 Minimum [Member] | Dec. 31, 2013 Minimum [Member] | Dec. 31, 2012 Maximum [Member] | Dec. 31, 2013 Maximum [Member] | Feb. 28, 2013 Non competition agreements [Member] | Feb. 28, 2013 Referral relationships [Member] Minimum [Member] | Feb. 28, 2013 Referral relationships [Member] Maximum [Member] | Dec. 31, 2013 February 2013 Acquisition [Member] Installment | Dec. 31, 2013 April 2013 Acquisition [Member] Installment | Dec. 31, 2013 May 2013 Acquisition [Member] Installment | Apr. 30, 2012 General Partner [Member] | Apr. 30, 2012 Limited Partner [Member] | Dec. 31, 2011 STAR Physical Therapy, LP [Member] Transactions | Jun. 30, 2011 Texas Partnerships [Member] Installment | Dec. 31, 2013 Texas Partnerships [Member] | Dec. 31, 2013 Texas Partnerships [Member] Outpatient Physical and Occupational Therapy Clinics [Member] Clinic | Dec. 31, 2013 Texas Partnerships [Member] Industrial Client Locations [Member] Clinic | Dec. 31, 2013 Texas Limited Liability Company [Member] | May 31, 2012 May 2013 [Member] | May 31, 2013 May 2014 [Member] | May 31, 2012 May 2014 [Member] | Feb. 28, 2013 February 2014 [Member] | Feb. 28, 2013 February 2015 [Member] | Apr. 30, 2013 April 2014 [Member] | Apr. 30, 2013 April 2015 [Member] | May 31, 2013 May 2015 [Member] | Dec. 13, 2013 December Two Thousand Fourteen [Member] | Dec. 13, 2013 December Two Thousand Fifteen [Member]
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of clinic practices acquired |  |  |  |  |  |  | 3 | 7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of clinic practices operated under separate partnership |  |  |  |  |  |  | 2 | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of clinic practices operated under existing partnership |  |  |  |  |  |  | 5 | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11 | 3 |  |  |  |  |  |  |  |  |  |  |
Percentage of purchase of non controlling interest | 90.00% | 60.00% |  |  |  |  |  |  |  | 70.00% | 51.00% | 100.00% | 10.00% | 1.00% | 35.00% | 35.00% |  |  |  | 72.00% | 50.00% | 80.00% |  |  | 22.20% | 35.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash paid for acquisition of interest in clinic | $ 35,500,000 | $ 1,700,000 |  | $ 6,090,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,300,000 | $ 2,400,000 | $ 3,600,000 |  |  |  | $ 3,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Seller notes issued for acquisition of interest in clinic | 500,000 |  |  | 100,000 |  |  | 1,300,000 | 350,000 |  | 250,000 | 200,000 |  |  |  |  |  |  |  |  | 400,000 | 200,000 | 200,000 |  |  |  | 367,272 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition cost payable in two principal installments including accrued interest |  |  | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 125,000 | 100,000 | 125,000 | 200,000 | 200,000 | 100,000 | 100,000 | 100,000 | 250,000 | 250,000
Business acquisition number of installments to payment of purchase consideration | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 | 2 | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Limited partnership interest owned by USPT Ltd. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 89.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Membership Interest owned by USPT Ltd. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |
Net revenue recognized |  |  |  |  |  |  | 505,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings recognized |  |  |  |  |  |  | 119,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate purchase price for the acquired clinic practices |  |  |  |  |  |  | 238,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Tax Deductible Goodwill |  |  |  | 67.00% |  |  |  |  |  | 70.00% | 51.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued interest seller note |  |  |  |  |  |  |  |  |  | 3.25% | 3.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, cost of acquired entity |  |  |  | 1,938,000 |  |  |  |  |  |  | 8,226,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | 16,900,000 | 3,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of annual installments |  |  |  |  |  |  | 2 | 2 |  |  | 2 | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Values assigned being amortized to expense equally over the respective estimated life |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6 years | 12 years | 13 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining proportion of July 2011 acquisition, the company owned. |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.00% | 49.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of proportion of interest in acquisition to limited partner |  |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash received by company under agreement regarding an adjustment to purchase price |  |  |  |  |  | 1,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forgiveness of the balance on notes payable under agreement regarding an adjustment to purchase price |  |  |  |  |  | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of forgiveness on notes payable held by seller under agreement regarding an adjustment to purchase price |  |  |  |  |  | 30.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Book value of notes payable held by seller |  |  |  |  |  | 3,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of separate transactions to purchase partnership interest |  |  |  |  |  |  | 15 | 15 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Partnership in which Interest Acquired |  |  |  |  |  |  | 10 | 15 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price for additional non controlling interest |  |  |  |  |  |  | 1,900,000 | 2,200,000 | 142,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sales of interest |  |  |  |  |  |  | 800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition cost of acquired entity charge from cash |  |  |  |  |  |  | 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition cost of acquired entity charge from notes receivable |  |  |  |  |  |  | 600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Undistributed earnings |  |  |  |  |  |  | 100,000 | 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 800,000 | 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Future tax benefits |  |  |  |  |  |  | 400,000 | 800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,300,000 | 1,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining purchase price |  |  |  |  |  |  | 1,000,000 | 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 16,100,000 | 3,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation less than wholly owned subsidiary parent ownership interest changes sale of interest percent by parent |  |  |  |  |  |  |  |  |  |  |  |  | 0.64% |  | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of partnership in interest sale by parent |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Divestiture of Interest in Consolidated Subsidiaries |  |  |  |  |  |  |  | 239,000 | 58,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation less than wholly owned subsidiary parent ownership interest changes sale of interest amount credit to additional paid up capital |  |  |  |  |  |  |  | 5,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non controlling interest of minority shareholders' before purchase of non controlling interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non controlling interest of minority shareholders' after purchase of non controlling interest |  |  |  |  |  |  |  |  | 92.20% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non controlling interest after purchase |  |  |  |  |  |  |  |  | 7.80% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non controlling interest of purchased interest held by Managing Director and a founder of STAR, percentage |  |  |  |  |  |  |  |  | 17.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of non controlling interest by Managing Director and a founder of STAR, percentage |  |  |  |  |  |  |  |  | 17.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining percentage on interest by Managing Director and a founder of STAR after sale |  |  |  |  |  |  |  |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation less than wholly owned subsidiary parent ownership interest amount changes purchase consideration charge from invested capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation less than wholly owned subsidiary parent ownership interest changes purchase consideration amount charge from additional paid up capital |  |  |  |  |  |  |  |  | 36,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation less than wholly owned subsidiary parent ownership interest amount changes purchase consideration charge from undistributed earning |  |  |  |  |  |  |  |  | 48,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation less than wholly owned subsidiary parent ownership interest changes future tax benefit |  |  |  |  |  |  |  |  | $ 23,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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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 + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
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- Definition The net gains or losses recognized for each transaction with the acquiree that was recognized separately from the acquisition of assets and assumptions of liabilities 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 (e)(3) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition Represents the purchase by the parent of an additional equity interest in a subsidiary during the period, thereby effecting a change in total (consolidated) equity attributable to the parent. The purchase of the additional equity interest represented by this element increases the parent's controlling interest in the subsidiary. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4M -URI http://asc.fasb.org/extlink&oid=31814832&loc=SL4591554-111686 + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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