CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Held for Investment, Fair Value, Total	$ 414,470	$ 369,881
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	47,032,259	38,090,568
Common stock, shares outstanding	46,917,735	38,021,835
Treasury Stock, Shares	114,524	68,733