CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current Assets:
Accounts Receivable, Allowance for Doubtful Accounts	$ 100	$ 311
Other Assets:
Deferred Charges, Accumulated Amortization	$ 17,429	$ 14,525
Stockholders' Equity:
Common Stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common Stock, shares authorized (in shares)	10,000,000	10,000,000
Common Stock, shares issued (in shares)	7,140,752	7,075,659
Common Stock, shares outstanding (in shares)	7,140,752	7,075,659
Treasury Stock, (in shares)	1,388,066	1,388,066