Reconciliation of total equity (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Changes in total equity
Balance, beginning of period			$ 18,467,000
Net (loss) income	(19,485,000)	(18,968,000)	(38,862,000)	(27,364,000)
Proceeds from noncontrolling interest holders			765,000
Amortization of loss related to termination of interest rate swap				(958,000)
Noncash contribution of capital by noncontrolling interest holders			4,235,000
Balance, end of period	(26,271,000)		(26,271,000)
Radiation Therapy Services Holdings, Inc. Shareholder's Equity
Changes in total equity
Balance, beginning of period			2,420,000	159,873,000
Net (loss) income			(39,880,000)	(29,753,000)
Other comprehensive income (loss) from unrealized loss on interest rate swap agreement				(333,000)
Other comprehensive loss from foreign currency translation			(5,062,000)	(2,711,000)
Amortization of loss related to termination of interest rate swap				958,000
Stock-based compensation			345,000	3,012,000
Balance, end of period	(42,177,000)	131,046,000	(42,177,000)	131,046,000
Noncontrolling interests - nonredeemable
Changes in total equity
Balance, beginning of period			16,047,000	17,421,000
Net (loss) income			1,009,000	1,821,000
Other comprehensive loss from foreign currency translation			(510,000)	(239,000)
Cash distributions			(640,000)	(1,585,000)
Balance, end of period	15,906,000	17,418,000	15,906,000	17,418,000
Total Equity
Changes in total equity
Balance, beginning of period			18,467,000	177,294,000
Net (loss) income			(38,871,000)	(27,932,000)
Other comprehensive income (loss) from unrealized loss on interest rate swap agreement				(333,000)
Other comprehensive loss from foreign currency translation			(5,572,000)	(2,950,000)
Amortization of loss related to termination of interest rate swap				958,000
Stock-based compensation			345,000	3,012,000
Cash distributions			(640,000)	(1,585,000)
Balance, end of period	(26,271,000)	148,464,000	(26,271,000)	148,464,000
Noncontrolling interests - redeemable
Changes in total equity
Balance, beginning of period			11,368,000	12,728,000
Net (loss) income			9,000	568,000
Other comprehensive loss from foreign currency translation			(17,000)	(70,000)
Proceeds from noncontrolling interest holders			765,000
Noncash contribution of capital by noncontrolling interest holders			4,235,000
Cash distributions			(10,000)	(433,000)
Balance, end of period	$ 16,350,000	$ 12,793,000	$ 16,350,000	$ 12,793,000