Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity - Additional Information (Detail)

v2.4.0.8
Shareholders' Equity - Additional Information (Detail) (USD $)
Share data in Millions, unless otherwise specified
12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2013
Dec. 31, 2013
Convertible Class B Stock [Member]
Stockholders Equity [Line Items]      
Common stock reserved   7.9  
Class B stock voting rights per share     10 votes per share
Effective income tax rate 35.00%    
Income tax effect recorded for currency translation adjustments $ 0