Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Assets
Securities held to maturity, fair value	$ 51,348	$ 51,662
Stockholders' equity
Preferred stock, authorized (in shares)	30,000	30,000
Stated value common stock - no par value	$ 1	$ 1
Common stock, authorized (in shares)	3,000,000	3,000,000
Common stock, issued (in shares)	1,751,431	1,751,431
Common stock, outstanding (in shares)	1,574,456	1,564,297
Treasury stock, at cost (in shares)	176,975	187,134