Financial Information for Subsidiary Guarantors and Non-Guarantor Subsidiaries under Select's 6.375% Senior Notes - Consolidating Statement of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating activities
Net income	$ 135,996	$ 128,175	$ 123,009
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Distributions from unconsolidated subsidiaries	13,969	11,954
Depreciation and amortization	104,981	68,354	64,392
Provision for bad debts	59,372	44,600	37,423
Equity in earnings of unconsolidated subsidiaries	(16,811)	(7,044)	(2,476)
Loss on early retirement of debt		2,277	18,747
Loss (gain) on sale of assets and businesses	(1,098)	(1,048)	(581)
Gain on sale of equity investment	29,647
Stock compensation expense	14,985	11,186	7,033
Amortization of debt discount, premium and issuance costs	9,543	7,553	8,433
Deferred income taxes	(2,058)	14,311	7,032
Changes in operating assets and liabilities, net of effects from acquisition of businesses:
Accounts receivable	(92,572)	(97,802)	(67,145)
Other current assets	(2,503)	(1,729)	(8,167)
Other assets	4,713	(103)	(3,484)
Accounts payable	2,345	5,997	(1,283)
Accrued expenses	7,200	(16,039)	9,590
Net cash provided by operating activities	208,415	170,642	192,523
Investing activities
Purchases of property and equipment	(182,642)	(95,246)	(73,660)
Proceeds from sale of assets	1,767		2,912
Investment in businesses	(2,347)	(4,634)	(34,893)
Proceeds from sale of equity method investment	33,096
Acquisition of businesses, net of cash acquired	(1,061,628)	(1,211)	(1,665)
Net cash used in investing activities	(1,211,754)	(101,091)	(107,306)
Financing activities
Borrowings on revolving facilities	1,135,000	910,000	690,000
Payments on revolving facilities	(895,000)	(870,000)	(800,000)
Proceeds from term loans, net of discount	646,875		298,500
Payments on term loans	(29,134)	(33,994)	(596,720)
Issuance of 6.375% senior notes, includes premium		111,650	600,000
Repurchase of 7 5/8% senior subordinated notes, net of premiums			(70,000)
Borrowings of other debt	13,374	9,076	15,310
Principle payments on other debt	(18,136)	(14,673)	(10,834)
Debt issuance costs	(23,300)	(4,434)	(18,914)
Proceeds from (repayment of) bank overdrafts	6,869	9,240	(5,330)
Purchase of non-controlling interests	(1,095)	(9,961)
Tax benefit from stock based awards	1,846	3,119
Proceeds from issuance of non-controlling interests	217,065	185
Distributions to non-controlling interests	(12,637)	(3,979)	(3,537)
Net cash provided by (used in) financing activities	1,014,420	(70,516)	(121,042)
Net increase (decrease) in cash and cash equivalents	11,081	(965)	(35,825)
Cash and cash equivalents at beginning of period	3,354	4,319	40,144
Cash and cash equivalents at end of period	14,435	3,354	4,319
Select
Operating activities
Net income	135,996	128,175	125,199
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Distributions from unconsolidated subsidiaries	13,969	11,954
Depreciation and amortization	104,981	68,354	64,392
Provision for bad debts	59,372	44,600	37,423
Equity in earnings of unconsolidated subsidiaries	(16,811)	(7,044)	(2,476)
Loss on early retirement of debt		2,277	17,788
Loss (gain) on sale of assets and businesses	(1,098)	(1,048)	(581)
Gain on sale of equity investment	29,647
Stock compensation expense	14,985	11,186	7,033
Amortization of debt discount, premium and issuance costs	9,543	7,553	8,344
Deferred income taxes	(2,058)	14,311	7,032
Changes in operating assets and liabilities, net of effects from acquisition of businesses:
Accounts receivable	(92,572)	(97,802)	(67,145)
Other current assets	(2,503)	(1,729)	(8,167)
Other assets	4,713	(103)	(3,484)
Accounts payable	2,345	5,997	(1,283)
Accrued expenses	7,200	(16,039)	14,027
Accrued expenses			15,068
Due to third-party payors			(1,041)
Net cash provided by operating activities	208,415	170,642	198,102
Investing activities
Purchases of property and equipment	(182,642)	(95,246)	(73,660)
Proceeds from sale of assets	1,767		2,912
Investment in businesses	(2,347)	(4,634)	(34,893)
Proceeds from sale of equity method investment	33,096
Acquisition of businesses, net of cash acquired	(1,061,628)	(1,211)	(1,665)
Net cash used in investing activities	(1,211,754)	(101,091)	(107,306)
Financing activities
Borrowings on revolving facilities	1,135,000	910,000	690,000
Payments on revolving facilities	(895,000)	(870,000)	(800,000)
Proceeds from term loans, net of discount	646,875		298,500
Payments on term loans	(29,134)	(33,994)	(596,720)
Issuance of 6.375% senior notes, includes premium		111,650	600,000
Repurchase of 7 5/8% senior subordinated notes, net of premiums			(70,000)
Borrowings of other debt	13,374	9,076	15,310
Principle payments on other debt	(18,136)	(14,673)	(10,834)
Debt issuance costs	(23,300)	(4,434)	(18,914)
Proceeds from (repayment of) bank overdrafts	6,869	9,240	(5,330)
Purchase of non-controlling interests	(1,095)	(9,961)
Equity investment by Holdings	1,649	7,355	1,525
Dividends paid to Holdings	(28,956)	(184,100)	(226,621)
Tax benefit from stock based awards	1,846	3,119
Proceeds from issuance of non-controlling interests	217,065	185
Distributions to non-controlling interests	(12,637)	(3,979)	(3,537)
Net cash provided by (used in) financing activities	1,014,420	(70,516)	(126,621)
Net increase (decrease) in cash and cash equivalents	11,081	(965)	(35,825)
Cash and cash equivalents at beginning of period	3,354	4,319	40,144
Cash and cash equivalents at end of period	14,435	3,354	4,319
Select | Reportable legal entities | Select Medical Corporation (Parent Company Only)
Operating activities
Net income	130,737	120,627	116,580
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	4,292	3,723	3,746
Loss on early retirement of debt		2,277	17,788
Stock compensation expense	13,969	11,186	7,033
Amortization of debt discount, premium and issuance costs	7,404	7,553	8,344
Deferred income taxes	(3,484)	14,311	7,032
Changes in operating assets and liabilities, net of effects from acquisition of businesses:
Equity in earnings of subsidiaries	(132,520)	(126,419)	(129,971)
Other current assets	(2,661)	1,885	(4,145)
Other assets	10,840	2,811	(6,594)
Accounts payable	560	3,136	2,075
Accrued expenses	(1,508)	(6,353)
Accrued expenses			(4,929)
Net cash provided by operating activities	27,629	34,737	16,959
Investing activities
Purchases of property and equipment	(10,890)	(4,674)	(3,024)
Net cash used in investing activities	(10,890)	(4,674)	(3,024)
Financing activities
Borrowings on revolving facilities	1,115,000	910,000	690,000
Payments on revolving facilities	(880,000)	(870,000)	(800,000)
Proceeds from term loans, net of discount			298,500
Payments on term loans	(26,884)	(33,994)	(596,720)
Issuance of 6.375% senior notes, includes premium		111,650	600,000
Repurchase of 7 5/8% senior subordinated notes, net of premiums			(70,000)
Borrowings of other debt	8,684	8,151	8,923
Principle payments on other debt	(11,923)	(9,213)	(7,752)
Debt issuance costs		(4,434)	(18,914)
Proceeds from (repayment of) bank overdrafts	6,869	9,240	(5,330)
Equity investment by Holdings	1,649	7,355	1,525
Dividends paid to Holdings	(28,956)	(184,100)	(226,621)
Intercompany	(199,024)	22,162	77,455
Tax benefit from stock based awards	1,846	3,119
Net cash provided by (used in) financing activities	(12,739)	(30,064)	(48,934)
Net increase (decrease) in cash and cash equivalents	4,000	(1)	(34,999)
Cash and cash equivalents at beginning of period	70	71	35,070
Cash and cash equivalents at end of period	4,070	70	71
Select | Reportable legal entities | Subsidiary Guarantors
Operating activities
Net income	138,567	127,333	130,997
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Distributions from unconsolidated subsidiaries	13,870	11,889
Depreciation and amortization	56,447	54,876	51,825
Provision for bad debts	40,541	38,052	31,173
Equity in earnings of unconsolidated subsidiaries	(16,719)	(6,958)	(2,384)
Loss (gain) on sale of assets and businesses	(1,128)	(1,168)	(463)
Gain on sale of equity investment	29,647
Changes in operating assets and liabilities, net of effects from acquisition of businesses:
Equity in earnings of subsidiaries	(9,117)	(8,995)	(14,561)
Accounts receivable	(83,142)	(80,394)	(60,460)
Other current assets	(2,236)	(4,004)	(5,849)
Other assets	(6,415)	(2,566)	3,026
Accounts payable	8,569	2,440	(3,746)
Accrued expenses	9,569	(9,407)
Accrued expenses			20,843
Due to third-party payors			3,067
Net cash provided by operating activities	119,159	121,098	153,468
Investing activities
Purchases of property and equipment	(134,002)	(79,600)	(60,532)
Proceeds from sale of assets	1,742		2,456
Investment in businesses	(2,347)	(4,634)	(34,893)
Proceeds from sale of equity method investment	33,096
Acquisition of businesses, net of cash acquired		(397)	(1,665)
Net cash used in investing activities	(101,511)	(84,631)	(94,634)
Financing activities
Borrowings of other debt			5,303
Principle payments on other debt	(2,736)	(2,058)	(873)
Purchase of non-controlling interests		(9,961)
Intercompany	(13,660)	(25,092)	(63,900)
Net cash provided by (used in) financing activities	(16,396)	(37,111)	(59,470)
Net increase (decrease) in cash and cash equivalents	1,252	(644)	(636)
Cash and cash equivalents at beginning of period	2,454	3,098	3,734
Cash and cash equivalents at end of period	3,706	2,454	3,098
Select | Reportable legal entities | Non-Guarantor Concentra
Operating activities
Net income	(10,005)
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	33,644
Provision for bad debts	9,591
Loss (gain) on sale of assets and businesses	14
Stock compensation expense	1,016
Amortization of debt discount, premium and issuance costs	2,139
Deferred income taxes	1,426
Changes in operating assets and liabilities, net of effects from acquisition of businesses:
Accounts receivable	825
Other current assets	2,790
Accounts payable	(9,438)
Accrued expenses	(6,557)
Net cash provided by operating activities	25,445
Investing activities
Purchases of property and equipment	(26,771)
Proceeds from sale of assets	1
Acquisition of businesses, net of cash acquired	(1,052,796)
Net cash used in investing activities	(1,079,566)
Financing activities
Borrowings on revolving facilities	20,000
Payments on revolving facilities	(15,000)
Proceeds from term loans, net of discount	646,875
Payments on term loans	(2,250)
Borrowings of other debt	3,009
Principle payments on other debt	(1,964)
Debt issuance costs	(23,300)
Intercompany	217,935
Proceeds from issuance of non-controlling interests	217,065
Distributions to non-controlling interests	(2,215)
Net cash provided by (used in) financing activities	1,060,155
Net increase (decrease) in cash and cash equivalents	6,034
Cash and cash equivalents at end of period	6,034
Select | Reportable legal entities | Non-Guarantor Subsidiaries
Operating activities
Net income	18,334	15,629	22,154
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Distributions from unconsolidated subsidiaries	99	65
Depreciation and amortization	10,598	9,755	8,821
Provision for bad debts	9,240	6,548	6,250
Equity in earnings of unconsolidated subsidiaries	(92)	(86)	(92)
Loss (gain) on sale of assets and businesses	16	120	(118)
Changes in operating assets and liabilities, net of effects from acquisition of businesses:
Accounts receivable	(10,255)	(17,408)	(6,685)
Other current assets	(396)	390	1,827
Other assets	288	(348)	84
Accounts payable	2,654	421	388
Accrued expenses	5,696	(279)
Accrued expenses			(846)
Due to third-party payors			(4,108)
Net cash provided by operating activities	36,182	14,807	27,675
Investing activities
Purchases of property and equipment	(10,979)	(10,972)	(10,104)
Proceeds from sale of assets	24		456
Acquisition of businesses, net of cash acquired	(8,832)	(814)
Net cash used in investing activities	(19,787)	(11,786)	(9,648)
Financing activities
Borrowings of other debt	1,681	925	1,084
Principle payments on other debt	(1,513)	(3,402)	(2,209)
Purchase of non-controlling interests	(1,095)
Intercompany	(5,251)	2,930	(13,555)
Proceeds from issuance of non-controlling interests		185
Distributions to non-controlling interests	(10,422)	(3,979)	(3,537)
Net cash provided by (used in) financing activities	(16,600)	(3,341)	(18,217)
Net increase (decrease) in cash and cash equivalents	(205)	(320)	(190)
Cash and cash equivalents at beginning of period	830	1,150	1,340
Cash and cash equivalents at end of period	625	830	1,150
Select | Eliminations
Operating activities
Net income	(141,637)	(135,414)	(144,532)
Changes in operating assets and liabilities, net of effects from acquisition of businesses:
Equity in earnings of subsidiaries	$ 141,637	$ 135,414	$ 144,532