CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Held for investment, fair value, total	$ 192,179	$ 262,213
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	120,000,000	120,000,000
Common stock, shares issued (in shares)	55,584,979	51,760,617
Common stock, shares outstanding (in shares)	55,243,226	51,513,733
Treasury stock (in shares)	341,753	246,884