CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Treasury stock, (in shares)	2,469,638	2,379,338
Common stock, shares authorized (in shares)	40,000,000	40,000,000
Investment Securities held-to-maturity securities, fair value disclosure	$ 377,383	$ 1,137
Common stock, shares issued (in shares)	20,386,221	19,446,187
Common stock, par value (in dollars per share)	$ 1.25	$ 1.25
Held-to-maturity, at fair value	$ 271,836	$ 254,261