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Fair Value Measurement (Details Textual) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Transfers between levels of fair value hierarchy $ 0 $ 0  
Fair value of loans held for investment 18,327   $ 21,544
Loans Receivable [Member] | Minimum [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Range of stated value   25.00%  
Loans Receivable [Member] | Maximum [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Range of stated value   48.40%  
Loans Receivable [Member] | Weighted Average [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Range of stated value   33.00%  
Interest Rate Lock Commitments [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Net unrealized gains recognized on outstanding nterest rate lock commitments $ 28,482 $ 26,019