CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
CONSOLIDATED BALANCE SHEETS
Loans, allowance for loan losses (in dollars)	$ 22,543	$ 22,499
Preferred stock, par value	$ 0
Preferred stock, Authorized shares	400,000	400,000
Preferred stock, Issued shares	0	0
Preferred stock, Outstanding shares	0	0
Preferred stock, Aggregate liquidation preference (in dollars)	$ 0
Common stock, stated value (in dollars per share)	$ 0.50
Common stock, Authorized shares	100,000,000
Common stock, Issued shares	26,121,057	24,682,189
Common stock, Outstanding shares	25,586,013	24,067,364
Treasury stock, shares	535,044	614,825