CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Allowance for loan losses (in dollars)	$ 18,773	$ 19,946
Common stock, stated value per share (usd per share)	$ 0.125	$ 0.125
Common stock, Authorized shares (shares)	40,000,000	40,000,000
Common stock, Issued shares (shares)	14,578,758	14,557,815
Common stock, Outstanding shares (shares)	12,216,712	12,740,018
Treasury stock (shares)	2,362,046	1,817,797