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Segment Reporting - Schedule of Reconciliation of Reportable Segment Revenue, Expenses and Profit (Parenthetical) (Detail) (Factoring Segment [Member])
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12 Months Ended | ||
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Factoring Segment [Member]
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| Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] | |||
| Funding costs of fed funds percentage | 2.50% | 2.50% | 2.50% |