Annual report pursuant to Section 13 and 15(d)

Subsequent Events - Additional Information (Detail)

v2.4.1.9
Subsequent Events - Additional Information (Detail) (USD $)
12 Months Ended 0 Months Ended
Dec. 31, 2014
Feb. 26, 2015
Subsequent Event [Line Items]    
Dividends declared, date Feb. 26, 2015  
Dividends declared, payable date Mar. 27, 2015  
Dividends declared, record date Mar. 13, 2015  
Subsequent Event [Member]    
Subsequent Event [Line Items]    
Dividends declared per share   $ 0.10us-gaap_CommonStockDividendsPerShareDeclared
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember