Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets
Collateral pledged	$ 1,580	$ 980
Allowance for loan losses on Portfolio loans, covered under FDIC loss share	11,339	15,410
State tax credits, held for sale, carried at fair value	$ 10,089	$ 11,689
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	30,000,000	30,000,000
Common stock, shares issued	20,035,165	19,913,519
Treasury stock, shares	76,000	76,000