Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References+ Details

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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- Definition

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 9

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 6

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 19

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.12)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 11

-Article 7

+ Details

Segment Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended									6 Months Ended		12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Information
Adjusted EBITDA	$ 105,958			$ 110,279						$ 206,039	$ 219,343	$ 405,847	$ 385,961	$ 307,079
Depreciation and amortization	(15,907)			(15,428)						(31,709)	(31,627)	(63,311)	(71,517)	(68,706)
Stock compensation expense												(5,677)	(3,725)	(2,236)
Income from operations	88,263	80,923	70,819	93,513	91,604	73,988	68,073	81,026	87,632	170,793	185,117	336,859	310,719	236,137
Equity in earnings of unconsolidated subsidiaries	568			2,752						1,626	5,217	7,705	2,923	(440)
Loss on early retirement of debt	(17,280)									(17,788)		(6,064)	(20,385)
Interest expense	(21,904)			(20,957)						(42,952)	(42,207)	(83,759)	(80,910)	(84,472)
Income before income taxes	49,647			75,308						111,679	148,127	254,741	212,347	151,857
Specialty Hospitals
Segment Information
Adjusted EBITDA	96,393			102,166						189,740	202,120	381,354	362,334	284,558
Depreciation and amortization	(11,932)			(11,479)						(23,794)	(23,322)	(46,836)	(50,629)	(45,116)
Income from operations	84,461			90,687						165,946	178,798	334,518	311,705	239,442
Outpatient Rehabilitation
Segment Information
Adjusted EBITDA	26,054			25,837						48,887	48,315	87,024	83,864	83,772
Depreciation and amortization	(3,001)			(3,232)						(5,970)	(6,882)	(13,208)	(16,487)	(20,444)
Income from operations	23,053			22,605						42,917	41,433	73,816	67,377	63,328
Other
Segment Information
Adjusted EBITDA	(16,489)			(17,724)						(32,588)	(31,092)	(62,531)	(60,237)	(61,251)
Depreciation and amortization	(974)			(717)						(1,945)	(1,423)	(3,267)	(4,401)	(3,146)
Stock compensation expense	(1,788)			(1,338)						(3,537)	(2,599)	(5,677)	(3,725)	(2,236)
Income from operations	$ (19,251)			$ (19,779)						$ (38,070)	$ (35,114)	$ (71,475)	$ (68,363)	$ (66,633)