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Commercial Mortgage Banking - Schedule of Amortization Expense (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Transfers And Servicing [Abstract]  
2013 $ 3,553
2014 3,537
2015 3,537
2016 3,500
2017 3,433
Thereafter 10,105
Amortization expense $ 27,665