CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
ASSETS
Non-utility property, less accumulated depreciation	$ 3,201	$ 3,164
Current Assets
Accounts receivable, allowance for uncollectible accounts	$ 2,920	$ 2,649
Common stock, par value (in dollars per share)	$ 6	$ 6
Common stock, shares authorized (in shares)	19,000,000	19,000,000
Common stock, shares issued (in shares)	15,551,168	15,470,217
Common stock, shares outstanding (in shares)	13,422,095	13,341,144
Treasury stock (in shares)	2,129,073	2,129,073