Condensed Consolidating Statements of Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Condensed Income Statements, Captions [Line Items]
Net revenues	$ 328,247	$ 270,306	$ 620,291	$ 488,145
Operating expenses:
Content costs	101,802	62,255	210,295	124,206
Other direct operating expenses	118,389	99,894	233,724	193,374
Depreciation and amortization	29,071	27,604	57,952	55,200
LMA fees	1,648	738	3,205	1,684
Corporate general and administrative expenses (including stock-based compensation expense)	19,264	7,742	38,458	21,760
Gain on sale of assets or stations	(360)	227	(898)	1,536
Gain on derivative instrument	0	(2,106)	0	(2,844)
Total operating expenses	269,814	196,354	542,736	394,916
Operating income	58,433	73,952	77,555	93,229
Non-operating (expense) income:
Interest expense	(36,468)	(44,197)	(72,733)	(88,719)
Interest income	342	364	672	634
Loss on early extinguishment of debt	0	(4,539)	0	(4,539)
Other income (expense), net	3,593	(393)	3,529	(106)
Total non-operating expense, net	(32,533)	(48,765)	(68,532)	(92,730)
Income from continuing operations before income taxes	25,900	25,187	9,023	499
Income tax expense	(10,763)	(10,073)	(3,155)	(12,049)
Income (loss) from continuing operations	15,137	15,114	5,868	(11,550)
Income from discontinued operations	0	11,987	0	29,662
(Loss) earnings from consolidated subsidiaries	0	0	0	0
Net income	15,137	27,101	5,868	18,112
Cumulus Media Inc. (Parent Guarantor)
Condensed Income Statements, Captions [Line Items]
Net revenues	0	0	0	0
Operating expenses:
Content costs	0	0	0	0
Other direct operating expenses	0	0	0	0
Depreciation and amortization	0	0	0	0
LMA fees	0	0	0	0
Corporate general and administrative expenses (including stock-based compensation expense)	0	0	0	0
Gain on sale of assets or stations	0	0	0	0
Gain on derivative instrument		0		0
Total operating expenses	0	0	0	0
Operating income	0	0	0	0
Non-operating (expense) income:
Interest expense	(2,406)	(2,378)	(4,981)	(4,689)
Interest income	0	0	0	0
Loss on early extinguishment of debt		0		0
Other income (expense), net	0	0	0	0
Total non-operating expense, net	(2,406)	(2,378)	(4,981)	(4,689)
Income from continuing operations before income taxes	(2,406)	(2,378)	(4,981)	(4,689)
Income tax expense	799	0	1,741	0
Income (loss) from continuing operations	(1,607)	(2,378)	(3,240)	(4,689)
Income from discontinued operations		0		0
(Loss) earnings from consolidated subsidiaries	16,744	29,479	9,108	22,801
Net income	15,137	27,101	5,868	18,112
Cumulus Media Holdings Inc. (Subsidiary Issuer)
Condensed Income Statements, Captions [Line Items]
Net revenues	125	0	229	0
Operating expenses:
Content costs	0	0	0	0
Other direct operating expenses	0	0	0	0
Depreciation and amortization	459	484	917	981
LMA fees	0	0	0	0
Corporate general and administrative expenses (including stock-based compensation expense)	19,264	7,742	38,458	21,760
Gain on sale of assets or stations	0	0	0	0
Gain on derivative instrument		0		0
Total operating expenses	19,723	8,226	39,375	22,741
Operating income	(19,598)	(8,226)	(39,146)	(22,741)
Non-operating (expense) income:
Interest expense	(33,987)	(41,819)	(67,583)	(84,030)
Interest income	0	0	0	0
Loss on early extinguishment of debt		(4,539)		(4,539)
Other income (expense), net	0	0	0	0
Total non-operating expense, net	(33,987)	(46,358)	(67,583)	(88,569)
Income from continuing operations before income taxes	(53,585)	(54,584)	(106,729)	(111,310)
Income tax expense	18,253	0	37,314	0
Income (loss) from continuing operations	(35,332)	(54,584)	(69,415)	(111,310)
Income from discontinued operations		0		0
(Loss) earnings from consolidated subsidiaries	52,076	84,063	78,523	134,111
Net income	16,744	29,479	9,108	22,801
Subsidiary Guarantors
Condensed Income Statements, Captions [Line Items]
Net revenues	328,122	270,306	620,062	488,145
Operating expenses:
Content costs	101,802	62,255	210,295	124,206
Other direct operating expenses	117,837	99,326	232,581	192,361
Depreciation and amortization	28,612	27,120	57,035	54,219
LMA fees	1,648	738	3,205	1,684
Corporate general and administrative expenses (including stock-based compensation expense)	0	0	0	0
Gain on sale of assets or stations	(360)	227	(898)	1,536
Gain on derivative instrument		(2,106)		(2,844)
Total operating expenses	249,539	187,560	502,218	371,162
Operating income	78,583	82,746	117,844	116,983
Non-operating (expense) income:
Interest expense	0	0	0	0
Interest income	342	364	672	634
Loss on early extinguishment of debt		0		0
Other income (expense), net	3,593	(393)	3,529	(106)
Total non-operating expense, net	3,935	(29)	4,201	528
Income from continuing operations before income taxes	82,518	82,717	122,045	117,511
Income tax expense	(30,070)	(35,608)	(42,669)	(35,829)
Income (loss) from continuing operations	52,448	47,109	79,376	81,682
Income from discontinued operations		55,531		61,882
(Loss) earnings from consolidated subsidiaries	(372)	(18,577)	(853)	(9,453)
Net income	52,076	84,063	78,523	134,111
Subsidiary Non-guarantors
Condensed Income Statements, Captions [Line Items]
Net revenues	0	0	0	0
Operating expenses:
Content costs	0	0	0	0
Other direct operating expenses	552	568	1,143	1,013
Depreciation and amortization	0	0	0	0
LMA fees	0	0	0	0
Corporate general and administrative expenses (including stock-based compensation expense)	0	0	0	0
Gain on sale of assets or stations	0	0	0	0
Gain on derivative instrument		0		0
Total operating expenses	552	568	1,143	1,013
Operating income	(552)	(568)	(1,143)	(1,013)
Non-operating (expense) income:
Interest expense	(75)	0	(169)	0
Interest income	0	0	0	0
Loss on early extinguishment of debt		0		0
Other income (expense), net	0	0	0	0
Total non-operating expense, net	(75)	0	(169)	0
Income from continuing operations before income taxes	(627)	(568)	(1,312)	(1,013)
Income tax expense	255	25,535	459	23,780
Income (loss) from continuing operations	(372)	24,967	(853)	22,767
Income from discontinued operations		(43,544)		(32,220)
(Loss) earnings from consolidated subsidiaries	0	0	0	0
Net income	(372)	(18,577)	(853)	(9,453)
Eliminations
Condensed Income Statements, Captions [Line Items]
Net revenues	0	0	0	0
Operating expenses:
Content costs	0	0	0	0
Other direct operating expenses	0	0	0	0
Depreciation and amortization	0	0	0	0
LMA fees	0	0	0	0
Corporate general and administrative expenses (including stock-based compensation expense)	0	0	0	0
Gain on sale of assets or stations	0	0	0	0
Gain on derivative instrument		0		0
Total operating expenses	0	0	0	0
Operating income	0	0	0	0
Non-operating (expense) income:
Interest expense	0	0	0	0
Interest income	0	0	0	0
Loss on early extinguishment of debt		0		0
Other income (expense), net	0	0	0	0
Total non-operating expense, net	0	0	0	0
Income from continuing operations before income taxes	0	0	0	0
Income tax expense	0	0	0	0
Income (loss) from continuing operations	0	0	0	0
Income from discontinued operations		0		0
(Loss) earnings from consolidated subsidiaries	(68,448)	(94,965)	(86,778)	(147,459)
Net income	$ (68,448)	$ (94,965)	$ (86,778)	$ (147,459)