Acquisitions And Other Arrangements (Narrative) (Details)						1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 02, 2015 USD ($)	Feb. 01, 2015 USD ($) store	Jan. 02, 2015 USD ($)	Oct. 25, 2013 USD ($)	May. 25, 2013 USD ($) item	Oct. 31, 2014 USD ($) item	Jun. 30, 2013 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) item	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Mar. 31, 2015 USD ($)	Jan. 06, 2015 USD ($)	May. 05, 2014 USD ($)	Apr. 21, 2014 USD ($)	Mar. 26, 2014 USD ($)	Feb. 10, 2014 USD ($)	Jan. 15, 2014 USD ($)	Jan. 13, 2014 USD ($)	Oct. 30, 2013 USD ($)	Jul. 31, 2013 USD ($)
Acquisitions [Line Items]
Capital lease obligations										$ 582,000	$ 7,069,000
Goodwill								$ 492,724,000		492,724,000		$ 469,596,000	$ 578,013,000	$ 492,724,000
Adjustments to goodwill										(41,000)		(115,000)
Initial deposit funded into an escrow account								3,050,000		3,050,000		7,051,000
Net patient service revenue								263,380,000	$ 245,950,000	520,137,000	459,858,000
Net income								(64,538,000)	(207,524,000)	(79,780,000)	(237,705,000)
Fair value adjustment of noncontrolling interest and earn-out liability								2,745,000	204,000	$ 3,205,000	403,000
Initial term of license agreement										1 year
Renewal period of license agreement										5 years
Proceeds from Divestiture of Interest in Consolidated Subsidiaries										$ 743,000	1,250,000
Parent [Member]
Acquisitions [Line Items]
Net income								(66,391,000)	(208,222,000)	(83,825,000)	(247,440,000)
Fair value adjustment of noncontrolling interest and earn-out liability								$ 3,083,000		$ 3,083,000
OnCure
Acquisitions [Line Items]
Number of radiation oncology treatment centers | item										33
Total purchase price				$ 126,890,000			$ 125,000,000
Purchase price, cash payment							42,500,000
Purchase price allocated to intangible assets				57,739,000
Amortization period of acquired intangible assets													11 years 7 months 6 days
Goodwill				$ 75,228,000
Adjustments to goodwill												(400,000)
Increase in current liabilities												300,000
Initial deposit funded into an escrow account							$ 5,000,000
Decrease in escrow account									3,300,000
Interest rate				11.75%
Debt subject escrow				$ 7,500,000
Notes issurance				82,500,000
Number of medical groups to whom acquiree provides services | item										11
Amortization expense													$ 900,000
Adjustment to accounts receivable												(2,400,000)
Increase in property and equipment												300,000
Increase in deferred tax liabilities												400,000
Purchase price allocated to deferred tax liabilities				32,052,000
Accounts receivable				$ 10,087,000
Radiation Treatment Center [Member] | New Jersey [Member]
Acquisitions [Line Items]
Number of radiation oncology treatment centers | store		3
Percentage in an unconsolidated joint venture sold		30.00%
Proceeds from Divestiture of Interest in Consolidated Subsidiaries		$ 700,000
Radiation Oncology Practice [Member] | Argentina [Member]
Acquisitions [Line Items]
Total purchase price																		$ 500,000
Purchase price allocated to tangible assets																		500,000
Purchase price allocated to intangible assets																		200,000
Purchase price allocated to current liabilities																		500,000
Goodwill																		$ 500,000
Ownership interest purchased																		75.00%
Purchase price allocated to redeemable noncontrolling interests																		$ 200,000
Radiation Oncology Practice [Member] | North Carolina [Member]
Acquisitions [Line Items]
Total purchase price																						$ 2,200,000
Purchase price allocated to tangible assets																						300,000
Purchase price allocated to intangible assets																						300,000
Goodwill																						$ 1,600,000
Radiation Oncology Practice [Member] | Florida
Acquisitions [Line Items]
Total purchase price															$ 500,000
Purchase price allocated to tangible assets															100,000
Purchase price allocated to current liabilities															200,000
Goodwill															600,000
Radiation Oncology Practice [Member] | Boca Raton, Florida [Member]
Acquisitions [Line Items]
Total purchase price																	$ 400,000
Purchase price allocated to assumed debt																	2,700,000
Purchase price allocated to tangible assets																	3,000,000
Radiation Oncology Practice [Member] | Warwick, Rhode Island [Member]
Acquisitions [Line Items]
Total purchase price															8,000,000
Purchase price allocated to tangible assets															600,000
Purchase price allocated to intangible assets															900,000
Goodwill															6,500,000
Radiation Oncology Practice [Member] | Non-Compete Agreement [Member] | Boca Raton, Florida [Member]
Acquisitions [Line Items]
Purchase price allocated to intangible assets																	$ 100,000
Radiation Oncology Practice [Member] | Non-Compete Agreement [Member] | Warwick, Rhode Island [Member]
Acquisitions [Line Items]
Purchase price allocated to intangible assets															200,000
Amortization period of acquired intangible assets										5 years
Radiation Oncology Practice [Member] | Certificates of need | Warwick, Rhode Island [Member]
Acquisitions [Line Items]
Purchase price allocated to intangible assets															700,000
Physician Practices [Member] | Florida
Acquisitions [Line Items]
Total purchase price												400,000
Purchase price allocated to tangible assets												$ 400,000
Physician Practices [Member] | Arizona, North Carolina, And New Jersey [Member]
Acquisitions [Line Items]
Total purchase price													800,000
Purchase price allocated to tangible assets													$ 800,000
Lee Collier Radiation Oncology Practices And Urology Group [Member] | Southwest Florida [Member]
Acquisitions [Line Items]
Total purchase price					$ 28,500,000
Purchase price, cash payment					17,700,000
Purchase price allocated to assumed debt					2,100,000
Capital lease obligations					8,700,000
Purchase price allocated to tangible assets					10,400,000
Amortization period of acquired intangible assets										5 years
Purchase price allocated to current liabilities					200,000
Goodwill					$ 16,400,000
Adjustments to goodwill									100,000
Increase in current liabilities									100,000
Number of radiation oncology practices acquired | item					5
Lee Collier Radiation Oncology Practices And Urology Group [Member] | Non-Compete Agreement [Member] | Southwest Florida [Member]
Acquisitions [Line Items]
Purchase price allocated to intangible assets					$ 1,900,000
Joint Venture With Radio Surgery Facility [Member]
Acquisitions [Line Items]
Percentage in an unconsolidated joint venture sold							45.00%
Interest in an unconsolidated joint venture sold							$ 1,500,000
Casa Grande, Arizona Joint Venture [Member] | Arizona [Member]
Acquisitions [Line Items]
Purchase price, cash payment							5,200,000
Purchase price allocated to tangible assets							2,200,000
Amortization period of acquired intangible assets										7 years
Purchase price allocated to current liabilities							100,000
Goodwill							$ 5,100,000
Adjustments to goodwill									100,000
Increase in current liabilities									100,000
Ownership interest purchased							55.00%
Purchase price allocated to redeemable noncontrolling interests							$ 4,200,000
Casa Grande, Arizona Joint Venture [Member] | Non-Compete Agreement [Member] | Arizona [Member]
Acquisitions [Line Items]
Purchase price allocated to intangible assets							400,000
Casa Grande, Arizona Joint Venture [Member] | Trade Names [Member] | Arizona [Member]
Acquisitions [Line Items]
Purchase price allocated to intangible assets							1,800,000
Woonsocket, Rhode Island Joint Venture [Member] | Rhode Island [Member]
Acquisitions [Line Items]
Total purchase price																							$ 1,500,000
Ownership interest purchased																							38.00%
Tiajuana, Mexico Radiation Treatment Center [Member] | Mexico [Member]
Acquisitions [Line Items]
Total purchase price																							$ 1,600,000
Quantum Care, LLC [Member]
Acquisitions [Line Items]
Total purchase price																					$ 1,900,000
Purchase price allocated to tangible assets																					1,400,000
Purchase price allocated to intangible assets																					100,000
Purchase price allocated to current liabilities																					200,000
Goodwill																					$ 600,000
Guatemala City Radiation Oncology Facility
Acquisitions [Line Items]
Total purchase price																				$ 900,000
Purchase price allocated to assumed debt																				3,100,000
Purchase price allocated to tangible assets																				2,800,000
Purchase price allocated to intangible assets																				600,000
Goodwill																				$ 1,300,000
Ownership interest purchased																				69.00%
Purchase price allocated to redeemable noncontrolling interests																				$ 500,000
Purchase price allocated to deferred tax liabilities																				200,000
Guatemala City Radiation Oncology Facility | Hospital Contracts [Member]
Acquisitions [Line Items]
Purchase price allocated to intangible assets																				200,000
Guatemala City Radiation Oncology Facility | Non-Compete Agreement [Member]
Acquisitions [Line Items]
Purchase price allocated to intangible assets																				100,000
Guatemala City Radiation Oncology Facility | Trade Names [Member]
Acquisitions [Line Items]
Purchase price allocated to intangible assets																				$ 300,000
South Florida Radiation Oncology
Acquisitions [Line Items]
Total purchase price																			$ 65,451,000
Purchase price allocated to assumed debt																			42,021,000
Purchase price allocated to intangible assets																			11,500,000
Amortization period of acquired intangible assets												4 years 9 months 18 days
Goodwill																			$ 123,453,000
Ownership interest purchased																			65.00%
Amortization expense												$ 2,400,000
Net patient service revenue									41,300,000		60,700,000
Net income									$ 900,000		$ 1,000,000
Gain on fair value adjustment of previously held equity investment										$ 13,000,000
Fair value adjustment of noncontrolling interest and earn-out liability										$ (9,200,000)
Accounts receivable																			$ 12,676,000
South Florida Radiation Oncology | Term Loan [Member]
Acquisitions [Line Items]
Interest rate																			10.50%
Face amount																			$ 60,000,000
Debt																			7,900,000
South Florida Radiation Oncology | Subsequent Event [Member]
Acquisitions [Line Items]
Total purchase price	$ 49,000,000
Purchase price, cash payment	$ 15,000,000
Ownership interest purchased	35.00%
Company's issuance of equity	$ 19,000,000
South Florida Radiation Oncology | Subsequent Event [Member] | Seller Financed Note [Member]
Acquisitions [Line Items]
Interest rate	10.00%
Face amount	$ 15,000,000
South Florida Radiation Oncology | Non-Compete Agreement [Member]
Acquisitions [Line Items]
Purchase price allocated to intangible assets																			9,400,000
Amortization period of acquired intangible assets										5 years
South Florida Radiation Oncology | Trade Names [Member]
Acquisitions [Line Items]
Purchase price allocated to intangible assets																			$ 2,100,000
Amortization period of acquired intangible assets										3 years
Freestanding Radiation Treatment Center [Member] | Florida
Acquisitions [Line Items]
Total purchase price																$ 500,000
Purchase price allocated to tangible assets																300,000
Goodwill																$ 200,000
Ownership interest purchased																50.00%
Purchase price allocated to redeemable noncontrolling interests																$ 400,000
Accounts receivable																$ 400,000
Radiation Oncology Facility [Member] | Kennewick, Washington [Member]
Acquisitions [Line Items]
Total purchase price			$ 19,200,000
Purchase price, cash payment			17,700,000
Capital lease obligations			300,000
Purchase price allocated to tangible assets			3,000,000
Purchase price allocated to intangible assets			2,200,000
Goodwill			$ 17,800,000
Ownership interest purchased			80.00%
Purchase price allocated to redeemable noncontrolling interests			$ 3,800,000
Earn out payments			1,300,000
Earn out period										3 years
Radiation Oncology Facility [Member] | Providence, Rhode Island [Member]
Acquisitions [Line Items]
Total purchase price															$ 1,200,000
Ownership interest purchased															9.00%
Radiation Oncology Facility [Member] | Non-Compete Agreement [Member] | Kennewick, Washington [Member]
Acquisitions [Line Items]
Purchase price allocated to intangible assets			$ 1,200,000
Amortization period of acquired intangible assets			5 years
Radiation Oncology Facility [Member] | Trade Names [Member] | Kennewick, Washington [Member]
Acquisitions [Line Items]
Purchase price allocated to intangible assets			$ 1,000,000
Public Health Trust [Member]
Acquisitions [Line Items]
Purchase price allocated to tangible assets						$ 1,400,000
Initial term of license agreement						5 years
Number of renewal options for license agreement | item						2
Renewal period of license agreement						5 years
Minimum [Member] | Radiation Oncology Facility [Member] | Kennewick, Washington [Member]
Acquisitions [Line Items]
Earn out payments			0
Maximum [Member] | OnCure
Acquisitions [Line Items]
Purchase price allocated to assumed debt							82,500,000
Assumed debt to be released							$ 7,500,000
Maximum [Member] | South Florida Radiation Oncology | Subsequent Event [Member]
Acquisitions [Line Items]
Earn out payments	$ 4,500,000
Maximum [Member] | Radiation Oncology Facility [Member] | Kennewick, Washington [Member]
Acquisitions [Line Items]
Earn out payments			$ 3,400,000