Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v2.4.0.8
Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
 1 Months Ended 12 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2012
Jun. 30, 2012
Dec. 31, 2013
Station
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Jan. 31, 2007
Jan. 31, 2007
Reduction of Retained Earnings
Jan. 31, 2007
Contingencies
Dec. 31, 2013
Los Angeles Market
Dec. 31, 2012
Los Angeles Market
Dec. 31, 2011
Los Angeles Market
Dec. 31, 2013
Dallas
Dec. 31, 2012
Dallas
Dec. 31, 2011
Dallas
Dec. 31, 2013
Broadcast
Segment
Dec. 31, 2012
Broadcast
Dec. 31, 2011
Broadcast
Dec. 31, 2013
All Other Segments
Segment
Dec. 31, 2011
KKMO-AM in Seattle, Washington
Dec. 31, 2011
KXMX-AM in Los Angeles, California
Dec. 31, 2012
KPXI-FM, Tyler-Longview, Texas
Dec. 31, 2013
Cleveland market [Member]
Dec. 31, 2013
Minimum
Dec. 31, 2013
Maximum
Dec. 31, 2013
Production Costs
Dec. 31, 2012
Production Costs
Dec. 31, 2011
Production Costs
Dec. 31, 2013
Broadcast licenses
Dec. 31, 2012
Broadcast licenses
Dec. 31, 2011
Broadcast licenses
Jun. 30, 2012
Mastheads
Dec. 31, 2013
Mastheads
Dec. 31, 2013
Fair value of interest rate swaps
Mar. 27, 2013
Fair value of interest rate swaps
Dec. 31, 2013
Fair value of interest rate swaps
Significant Other Observable Inputs (Level 2)
Schedule Of Significant Accounting Policies [Line Items]                                                                          
Radio stations to be owned and/or operated throughout United States     103                                                                    
Advertising revenue                                 $ 5,600,000 $ 5,300,000 $ 5,200,000                                    
Interest capitalized     100,000 100,000                                                                  
Carrying amount of property plant and equipment         0                                                                
Impairment charge 1,200,000 5,600,000                                                       0 0 0 100,000        
Impairment Charges Land Held For Sale   5,600,000 0 1,200,000                                                                  
Internally developed software and website development capitalized costs     1,500,000 2,300,000 2,300,000                                                                
Amortization expense for internally developed software and website development capitalized costs     2,300,000 2,100,000 1,800,000                                                                
Internally developed software and website development capitalized costs, useful life     3 years                                                                    
Cost of media advertising and associated production costs                                                     10,000,000 10,500,000 10,300,000                
Amortization of intangible assets     0 0 0                                                                
Percentage of indefinite-lived intangible assets out of total assets     70.00%                                                                    
Percentage of indefinite-lived intangible assets                                                           94.00%       6.00%      
Broadcast licenses renewal period     8 years                                                                    
(Gain) loss on disposal of assets     264,000 (49,000) 4,153,000                                                                
Pre-tax (Gain) loss on disposal of assets     (62,000) (158,000) (1,225,000)                               2,400,000 2,100,000 200,000 400,000                          
Pre-tax (Gain) loss on disposal of assets     100,000 600,000                                                                  
Lease term                                                 1 year 25 years                      
Deferred rent revenue 4,600,000   4,500,000 4,600,000                                                                  
Sublease term     60 years                                                                    
Write off bond issue costs       300,000 100,000 700,000                                                              
Payments to redeem notes     213,500,000 21,500,000 35,000,000 30,000,000                                                              
Deferred financing costs amortization period             3 years                                                            
Self insurance liability 600,000   500,000 600,000                                                                  
Interest rate swap agreement, notional principal amount                                                                       150,000,000  
Payments swap LIBOR floor rate                                                                     0.625%    
Interest rate swap, expiration date                                                                     Mar. 28, 2019    
Interest rate swap, fixed rate                                                                     1.645%    
Change in fair value of the interest rate swap agreement asset                                                                         3,200,000
Debt, principal payment     0                                                                    
Liabilities for unrecognized tax benefits 1,300,000   900,000 1,300,000 3,800,000     3,000,000 2,100,000 900,000                                                      
Unrecognized tax benefit, interest accrued net of federal income tax benefits     10,000         100,000                                                          
Increase (decrease) in unrecognized tax benefits     (400,000) (2,500,000) 200,000                                                                
Unrecognized tax benefits, penalty     20,000                                                                    
Additional reduction of reserve     400,000                                                                    
Valuation allowance to offset deferred tax asset $ 2,913,000   $ 2,868,000 $ 2,913,000                                                                  
Options to purchase Class A common stock 1,927,099   2,162,067 1,927,099 1,640,392 1,151,998                                                              
Number Of Anti Dilutive Shares       480,825 1,397,538                                                                
Reportable operating segments                                 1     2                                  
Percentage of Total Revenue generated from advertising                     15.20% 16.20% 15.20% 25.50% 23.60% 23.20% 41.80% 42.30% 43.00%