Reconciliation Of Total Equity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Schedule of Capitalization, Equity [Line Items]
Balance, beginning of period			$ (456,610)
Net (loss) income	$ (64,538)	$ (207,524)	(79,780)	$ (237,705)
Accretion of Series A convertible redeemable preferred stock to redemption value	2,032		4,011
Accrued Series A convertible redeemable preferred stock dividends	45,534		45,534
Proceeds from issuance of noncontrolling interest			743	1,250
Proceeds from noncontrolling interest holders - redeemable and non-redeemable			3,230	229
Balance, end of period	(587,600)		(587,600)
Radiation Therapy Services Holdings, Inc. Shareholder's Equity [Member]
Schedule of Capitalization, Equity [Line Items]
Balance, beginning of period			(480,176)	(93,751)
Net (loss) income			(79,780)	(237,705)
Other comprehensive loss from foreign currency translation			(4,045)	(9,735)
Accretion of Series A convertible redeemable preferred stock to redemption value			(4,011)
Accrued Series A convertible redeemable preferred stock dividends	45,534		45,534
Purchase and sale of noncontrolling interests			(378)
Proceeds from issuance of noncontrolling interest				84
Stock-based compensation			5	71
Balance, end of period	(613,919)	(341,036)	(613,919)	(341,036)
Noncontrolling Interests - Nonredeemable [Member]
Schedule of Capitalization, Equity [Line Items]
Balance, beginning of period			23,566	14,533
Net (loss) income			1,917	903
Other comprehensive loss from foreign currency translation			(456)	(860)
Purchase price fair value of noncontrolling interest				645
Purchase and sale of noncontrolling interests			(738)
Proceeds from issuance of noncontrolling interest				1,166
Proceeds from noncontrolling interest holders - redeemable and non-redeemable			3,170	229
Distributions			(1,140)	(624)
Balance, end of period	26,319	15,992	26,319	15,992
Equity [Member]
Schedule of Capitalization, Equity [Line Items]
Balance, beginning of period			(456,610)	(79,218)
Net (loss) income			(77,863)	(236,802)
Other comprehensive loss from foreign currency translation			(4,501)	(10,595)
Accretion of Series A convertible redeemable preferred stock to redemption value			(4,011)
Accrued Series A convertible redeemable preferred stock dividends	45,534		45,534
Purchase price fair value of noncontrolling interest				645
Purchase and sale of noncontrolling interests			(1,116)
Proceeds from issuance of noncontrolling interest				1,250
Proceeds from noncontrolling interest holders - redeemable and non-redeemable			3,170	229
Stock-based compensation			5	71
Distributions			(1,140)	(624)
Balance, end of period	(587,600)	(325,044)	(587,600)	(325,044)
Noncontrolling Interests - Redeemable [Member]
Schedule of Capitalization, Equity [Line Items]
Balance, beginning of period			49,797	15,899
Net (loss) income			2,466	2,958
Other comprehensive loss from foreign currency translation			4	(11)
Purchase price fair value of noncontrolling interest			16,733	28,420
Purchase and sale of noncontrolling interests			626
Proceeds from noncontrolling interest holders - redeemable and non-redeemable			60
Distributions			(892)	(614)
Balance, end of period	$ 68,794	$ 46,652	$ 68,794	$ 46,652