Other Income and Loss (Narrative) (Details) - USD ($)				1 Months Ended					3 Months Ended					12 Months Ended
		Oct. 25, 2013	May 10, 2012	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012	Nov. 30, 2012	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012		Feb. 10, 2014	Mar. 01, 2011
Impairment Loss
Impairment loss									$ 47,526,000	$ 182,000,000				$ 229,526,000	[1]		[1]	$ 81,021,000	[1]
Impairment charges related to goodwill												$ 14,084,000	$ 66,507,000			0
Joint venture ownership interest sold						45.00%
Interest in an unconsolidated joint venture sold						$ 1,500,000
Proceeds from leaseback sale				$ 5,700,000	$ 18,400,000
Loss on sale leaseback transaction				$ 100,000	300,000						$ 135,000			135,000	[1]	313,000	[1]		[1]
Adjustment to the earn-out payment	[1]													11,052,000		7,950,000		400,000
Fair value adjustment of earn-out liability and noncontrolling interests-redeemable									209,000	204,000	$ 199,000			1,627,000	[1]	130,000	[1]	1,219,000	[1]
Write-off of loan costs	[1]																	525,000
Repayment of long-term debt	[1]													268,377,000		171,432,000		383,344,000
Impairment loss														0		0		0
Leasehold Improvements
Impairment Loss
Impairment loss													$ 100,000
8 7/8% Senior Secured Second Lien Notes Due January 2017
Impairment Loss
Interest rate			8.875%
Notes issurance			$ 350,000,000
Senior Secured Credit Facility - (Term Loan B Portion)
Impairment Loss
Repayment of long-term debt																265,400,000
Senior secured credit facility (revolving credit portion)
Impairment Loss
Repayment of long-term debt																63,000,000
Senior secured credit facility - Term Loan B portion and Senior secured credit facility - revolving credit portion
Impairment Loss
Original issue discount costs																800,000
Expenses in early extinguishment of debt																4,500,000
Write-off of loan costs																3,700,000
Term Loan A And Term B Loan [Member]
Impairment Loss
Original issue discount costs									2,700,000
Extinguishment of debt									8,600,000
Expenses in early extinguishment of debt									3,800,000
Write-off of loan costs									2,000,000
Term Loan A And Term B Loan [Member] | Theriac Management Investments Llc [Member]
Impairment Loss
Expenses in early extinguishment of debt									300,000
South Florida Radiation Oncology
Impairment Loss
Amortization expense														2,400,000
Contingent, earn-out																				$ 11,052,000
Fair value of contingent earn-out														11,900,000
Fair value adjustment of earn-out liability and noncontrolling interests-redeemable														800,000
Interest rate																				10.50%
Medical Developers, LLC and Clinica de Radioterapia La Asuncion
Impairment Loss
Contingent, earn-out							$ 3,400,000					3,400,000						$ 3,400,000			$ 2,300,000
Adjustment to the earn-out payment							$ 1,200,000
OnCure
Impairment Loss
Amortization expense																900,000
Contingent, earn-out		$ 7,550,000
Adjustment to the earn-out payment														100,000
Fair value of contingent earn-out					$ 7,600,000									$ 800,000		$ 7,600,000
Interest rate		11.75%
Notes issurance		$ 82,500,000
Argentina | All acquired operating entities
Impairment Loss
Fair value adjustment of noncontrolling interest								$ 200,000
Amount for which remaining interest acquired								$ 1,400,000
Delmarva Peninsula | Leasehold Improvements
Impairment Loss
Impairment loss												100,000
Central Maryland local market | Leasehold Improvements
Impairment Loss
Impairment loss												$ 200,000
New York
Impairment Loss
Impairment loss									$ 1,200,000
Write-off									33.60%
Other Commitment										$ 10,000,000

[1] As Restated