Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Mastheads Calculated by Discounted Cash Flow Method (Detail)

v2.4.0.8
Fair Value of Mastheads Calculated by Discounted Cash Flow Method (Detail) (Mastheads)
6 Months Ended 12 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Schedule Of Goodwill And Intangible Assets [Line Items]    
Discount rate 9.00% 8.50%
Royalty growth rate 3.00% 3.00%
Minimum
   
Schedule Of Goodwill And Intangible Assets [Line Items]    
Projected revenue growth ranges 1.00% 1.50%
Maximum
   
Schedule Of Goodwill And Intangible Assets [Line Items]    
Projected revenue growth ranges 2.80% 3.00%