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 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense, pre-tax $ 299 $ 165 $ 995 $ 646
Tax provision for stock-based compensation expense (119) (37) (430) (247)
Total stock-based compensation expense, net of tax 180 128 565 399
Stock Option | Corporate
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense, pre-tax 195 97 652 395
Stock Option | Broadcast
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense, pre-tax 71 51 241 195
Stock Option | Internet
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense, pre-tax 28 15 87 47
Stock Option | Publishing
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense, pre-tax 5 2 15 5
Restricted stock | Corporate
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense, pre-tax       $ 4