Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v2.4.0.6
Subsequent Events - Additional Information (Detail) (Dividend Declared, USD $)
1 Months Ended
Oct. 18, 2012
Dividend Declared
 
Subsequent Event [Line Items]  
Dividends declared date Oct. 18, 2012
Cash dividend $ 0.87
Dividends payable date Dec. 20, 2012
Dividends record date Dec. 10, 2012