Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v2.4.0.8
Subsequent Events - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
0 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Apr. 30, 2014
Subsequent Event [Member]
Public Offering [Member]
Apr. 30, 2014
Subsequent Event [Member]
Public Offering [Member]
Underwriters [Member]
Subsequent Event [Line Items]        
Common stock issued 15,892,927 15,892,927 5,750,000 750,000
Common stock price per share $ 0.01 $ 0.01 $ 13.00  
Net proceeds from issuance of common stock     $ 70.3