Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Assets
Collateral pledged	$ 15,285	$ 1,305
State Tax Credits Held For Sale, Fair Value Disclosure	$ 0	$ 0
Shareholders' equity:
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	45,000,000	30,000,000
Common stock, shares issued	28,067,087	23,938,994
Treasury stock, shares	1,523,842	1,127,105