Condensed Consolidated Statements Of Operations And Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues:
Net patient service revenue	$ 239,606	$ 238,403	$ 759,743	$ 698,261
Management fees	14,180	16,762	45,261	50,215
Other revenue	4,199	2,453	16,673	8,437
Total revenues	257,985	257,618	821,677	756,913
Expenses:
Salaries and benefits	142,640	134,599	436,996	396,311
Medical supplies	22,498	24,771	73,563	71,007
Facility rent expenses	16,821	14,867	50,618	47,529
Other operating expenses	16,049	15,558	47,046	46,035
General and administrative expenses	68,236	37,811	140,922	101,985
Depreciation and amortization	22,479	22,388	67,290	65,272
Provision for doubtful accounts	5,651	5,621	13,872	13,345
Interest expense, net	23,724	30,233	73,737	87,659
Gain on BP settlement	(5,796)		(5,796)
Impairment loss		47,526		229,526
Early extinguishment of debt		8,558	37,390	8,558
Equity initial public offering expenses		742		4,905
Loss on sale leaseback transaction				135
Fair value adjustment of noncontrolling interest and earn-out liabilities	(3,723)	209	(518)	612
Fair value adjustment of embedded derivatives and other financial instruments	2,363		8,922
Loss on foreign currency transactions	337	210	548	317
Gain on foreign currency derivative contracts				(4)
Total expenses	311,279	343,093	944,590	1,073,192
Loss before income taxes	(53,294)	(85,475)	(122,913)	(316,279)
Income tax expense	1,152	1,173	6,930	4,213
Net loss	(54,446)	(86,648)	(129,843)	(320,492)
Net income attributable to noncontrolling interests - redeemable and non-redeemable	(2,458)	(729)	(6,841)	(4,590)
Net loss attributable to 21st Century Oncology Holdings, Inc. shareholder	(56,904)	(87,377)	(136,684)	(325,082)
Other comprehensive loss
Unrealized loss on foreign currency translation	(2,688)	(1,990)	(7,185)	(12,596)
Other comprehensive loss	(2,688)	(1,990)	(7,185)	(12,596)
Comprehensive loss	(57,134)	(88,638)	(137,028)	(333,088)
Comprehensive income attributable to noncontrolling interests-redeemable and non-redeemable:	(2,043)	(512)	(5,974)	(3,502)
Comprehensive loss attributable to 21st Century Oncology Holdings, Inc. shareholder	$ (59,177)	$ (89,150)	$ (143,002)	$ (336,590)