CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current Assets:
Accounts Receivable, Allowance for Doubtful Accounts	$ 100	$ 100
Other Assets:
Deferred Charges, Accumulated Amortization	$ 18,495	$ 17,429
Stockholders' Equity:
Common Stock, par value (in dollars per share)	$ 1	$ 1
Common Stock, shares authorized (in shares)	10,000,000	10,000,000
Common Stock, shares issued (in shares)	7,203,860	7,140,752
Common Stock, shares outstanding (in shares)	7,203,860	7,140,752
Treasury Stock, (in shares)	1,388,066	1,388,066