XML 125 R115.htm IDEA: XBRL DOCUMENT v2.4.0.6
Regulatory Capital Requirements And Restrictions - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Minimum net worth required $ 1  
Net worth $ 205.54 $ 176.63