Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation Expense Recognized (Detail)

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Stock-Based Compensation Expense Recognized (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense, pre-tax $ 369 $ 175 $ 696 $ 481
Tax provision for stock-based compensation expense (168) (70) (311) (210)
Total stock-based compensation expense, net of tax 201 105 385 270
Stock Option | Corporate
        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense, pre-tax 250 115 457 298
Stock Option | Radio Broadcast
        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense, pre-tax 83 44 170 144
Stock Option | Internet
        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense, pre-tax 31 13 59 32
Stock Option | Publishing
        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense, pre-tax 5 3 10 3
Restricted stock | Corporate
        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense, pre-tax       $ 4