Annual report pursuant to Section 13 and 15(d)

Subsequent Events - Additional Information (Detail)

v2.4.0.8
Subsequent Events - Additional Information (Detail) (USD $)
12 Months Ended 0 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Feb. 27, 2014
Subsequent Event [Member]
Subsequent Event [Line Items]        
Dividends declared per share $ 0.40 $ 0.40 $ 0.24 $ 0.10
Dividends declared, date Feb. 27, 2014      
Dividends declared, payable date Mar. 24, 2014      
Dividends declared, record date Mar. 14, 2014