Annual report pursuant to Section 13 and 15(d)

Subsequent Event - Dividend Declaration - Additional Information (Detail)

v2.4.1.9
Subsequent Event - Dividend Declaration - Additional Information (Detail) (USD $)
0 Months Ended
Aug. 15, 2013
Feb. 11, 2015
Subsequent Event [Line Items]    
Cash Dividends approved per common share $ 0.25us-gaap_CommonStockDividendsPerShareDeclared  
Subsequent Event    
Subsequent Event [Line Items]    
Cash Dividends approved per common share   $ 0.25us-gaap_CommonStockDividendsPerShareDeclared
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Declaration Date   Feb. 11, 2015
Record Date   Mar. 04, 2015
Dividend Payable Date   Mar. 18, 2015