Segment Reporting - Schedule of Reconciliation of Reportable Segment Revenue, Expenses and Profit (Parenthetical) (Detail) (Factoring Segment [Member])
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Factoring Segment [Member]
     
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%