Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Expense Recognized (Detail)

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Stock-Based Compensation Expense Recognized (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total stock-based compensation expense, pre-tax $ 1,849 $ 1,368 $ 950
Tax benefit (expense) from stock-based compensation expense (740) (579) (220)
Total stock-based compensation expense, net of tax 1,109 789 730
Corporate
      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Stock option expense 766 933 603
Restricted stock expenses 481   4
Broadcast
      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Stock option expense 302 305 281
Internet
      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Stock option expense 253 111 52
Publishing
      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Stock option expense $ 47 $ 19 $ 10