Fair Value of Financial Instruments (Assets and Liabilities Measured at Fair Value) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for investment	$ 0	$ 0
Loans held for sale	0	0
Total assets	0	0
Fixed-rate debt	0	0
Total fixed-rate debt	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for investment	0	0
Total assets	0	0
Fixed-rate debt	0	0
Total fixed-rate debt	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for investment	932,343	979,780
Loans held for sale	0	394
Total assets	932,343	980,174
Fixed-rate debt	293,848	275,200
Total fixed-rate debt	293,848	275,200
Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for investment	843,781	890,283
Loans held for sale	0	373
Total assets	843,781	890,656
Fixed-rate debt	300,706	280,886
Total fixed-rate debt	300,706	280,886
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for investment	932,343	979,780
Loans held for sale	0	394
Total assets	932,343	980,174
Fixed-rate debt	293,512	275,200
Total fixed-rate debt	$ 293,512	$ 275,200