XML 22 R67.htm IDEA: XBRL DOCUMENT v2.4.0.6
Supplemental Cash Flow Information - Additional Information (Detail) (Frontline, USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jul. 31, 2012
Frontline
 
Schedule of Cash Flow, Supplemental [Line Items]  
Returns received on investment $ 2,350