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Earnings / (Loss) Per Common Share (Schedule of Earnings / (Loss) Per Common Share) (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Earnings Per Share [Line Items] |  |  |
Net income / (loss) attributable to IFMI | $ (4,079) | $ (2,585) | $ (13,318)
Add/ (deduct): Income / (loss) attributable to non-controlling interest attributable to Operating LLC membership | (1,589) | (1,087) | (6,592)
Add / (deduct): Adjustment | 103 | 185 | 876
Net income / (loss) on a fully converted basis | $ (5,565) | $ (3,487) | $ (19,034)
Weighted average common shares outstanding - Basic | 14,790,828 | 14,998,620 | 12,340,468
Unrestricted Operating LLC membership units | 5,324,090 | 5,324,130 | 5,324,090
Weighted average common shares outstanding - Diluted | 20,114,918 | 20,322,750 | 17,664,558
Net income / (loss) per common share - Basic | $ (0.28) | $ (0.17) | $ (1.08)
Net income / (loss) per common share - Diluted | $ (0.28) | $ (0.17) | $ (1.08)
Number of shares issuable upon conversion of each unit | 1 |  |
Number of trading days used to determine average share price | 10 days |  |
8.00% Contingent Convertible Senior Notes Due 2018 [Member] | Contingent Convertible Senior Notes [Member] |  |  |
Earnings Per Share [Line Items] |  |  |
Note rate | 8.00% |  |
Stock Compensation Plan [Member] |  |  |
Earnings Per Share [Line Items] |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 12,630 | 121,914 | 395,457
Convertible Debt Securities [Member] |  |  |
Earnings Per Share [Line Items] |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 2,749,167 | 2,749,167 | 732,115

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