Other Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Other Assets [Line Items]
Other assets	$ 23,921	$ 2,366
Accounts Receivable From Investors
Other Assets [Line Items]
Other assets	18,116
Prepaid Expenses
Other Assets [Line Items]
Other assets	3,546	1,538
Loan Servicing Asset Fair Value
Other Assets [Line Items]
Other assets	534
Tenant Improvement Receivable
Other Assets [Line Items]
Other assets	504
Accounts Receivable
Other Assets [Line Items]
Other assets	439	79
Deposits
Other Assets [Line Items]
Other assets	193	696
Other
Other Assets [Line Items]
Other assets	$ 589	$ 53