XML 140 R115.htm IDEA: XBRL DOCUMENT v2.4.0.6
Equity-Based Compensation - Summary of Restricted Common Stock and Restricted Units Pursuant to Equity Incentive Plan Vesting (Parenthetical) (Detail) (USD $)
12 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2012
Mar. 31, 2012
Restricted Stock Units [Member]
Dec. 31, 2012
2006 Equity Incentive Plan [Member]
Compensation and benefits [Member]
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of restricted units of IFMI common stock issued to a non-employee   500,000  
Value of restricted units as of grant date $ 0.00    
Number of restricted units forfeited to achieve certain performance threshold     (50,000)