Quarterly report pursuant to Section 13 or 15(d)

Equity Transactions - Additional Information (Detail)

v2.4.0.8
Equity Transactions - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Equity [Abstract]    
Stock based compensation expenses $ 0.6 $ 0.8
Class A and class B common stock, expected annual dividend payment $ 5.8