Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Assets
Collateral pledged	$ 135	$ 14,595
Shareholders' equity:
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	75,000	75,000
Preferred stock, shares outstanding	75,000	75,000
Preferred stock, liquidation preference (in dollars per share)	$ 1,000	$ 1,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	37,205,524	39,799,615
Treasury stock, shares	0	1,980,093