Financial Assets and Liabilities and Non-Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (Fair Value, Measurements, Recurring, USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial assets:	$ 10,105		$ 126
Financial liabilities:	(181)		(31)
Equity interest in Pulser Media
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial assets:	10,105	[1]	104	[1]
Interest Rate Cap
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial assets:			22	[2]
Contingent Consideration
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities:	(181)	[3]	(31)	[3]
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial assets:	0		22
Significant Other Observable Inputs (Level 2) | Interest Rate Cap
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial assets:			22	[2]
Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial assets:	10,105		104
Financial liabilities:	(181)		(31)
Significant Unobservable Inputs (Level 3) | Equity interest in Pulser Media
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial assets:	10,105	[1]	104	[1]
Significant Unobservable Inputs (Level 3) | Contingent Consideration
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities:	$ (181)	[3]	$ (31)	[3]

[1] On September 13, 2013, the Company and Pulser Media (the parent company of Rdio) ("Pulser"), entered into a five year strategic promotional partnership and sales arrangement (the "Rdio Agreement"). In exchange for $75 million of promotional commitments over five years, Cumulus will receive a 15% equity interest in Pulser, with the opportunity to earn additional equity, see Note 13 "Commitments and Contingencies". The fair value of the equity interest in Pulser was determined using inputs that are supported by little or no market activity (a Level 3 measurement). At September 30, 2014 the fair value of the equity interest in Pulser approximated its cost basis and the Company determined that the investment was not impaired.

[2] Pursuant to the Interest Rate Cap, the Company pays a fixed interest rate on a $71.3 million notional amount of its term loan. The fair value of the Interest Rate Cap is determined based on a discounted cash flow analysis of the expected future cash flows using observable inputs, including interest rates and yield curves. Derivative valuations incorporate adjustments that are necessary to reflect the credit risk.

[3] The fair value of the contingent consideration was determined using inputs that are supported by little or no market activity (a Level 3 measurement). Contingent consideration represents the fair value of the additional cash consideration potentially payable as part of the WFME Asset Exchange and Wise Brothers Acquisition. See Note 2 “Acquisitions and Dispositions”.