Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Allowance for credit loss	$ 2,857	$ 2,429
Equity securities at fair value	$ 115,338	$ 102,529
Preferred Stock, Par or Stated Value Per Share	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	5,000,000	5,000,000
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	51,026,000	46,625,000
Common stock, shares outstanding	45,695,000	43,023,000
Treasury stock, shares	5,331,000	3,602,000
Series A-1 Preferred Stock
Preferred stock, shares issued	0	4,204,000
Preferred stock, shares outstanding	0	4,204,000
Series B Preferred Stock
Preferred stock, shares issued	0	357,000
Preferred stock, shares outstanding	0	357,000