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, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Total stock-based compensation expense, pre-tax $ 358 $ 299 $ 1,529 $ 995
Tax provision for stock-based compensation expense (143) (119) (611) (430)
Total stock-based compensation expense, net of tax 215 180 918 565
Corporate
        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock option expense 243 195 555 652
Restricted stock expense     481  
Broadcast
        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock option expense 43 71 260 241
Internet
        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock option expense 62 28 195 87
Publishing
        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock option expense $ 10 $ 5 $ 38 $ 15