CONSOLIDATED BALANCE SHEETS - DECEMBER 31, 2011 AND REVISED DECEMBER 31, 2010 (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Accounts receivable, allowance for doubtful receivables	$ 622	$ 945
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, authorized	500,000	500,000
Preferred stock, issued
Preferred stock, outstanding
Common stock, par value	$ 0.10	$ 0.10
Common stock, authorized	30,000	30,000
Common stock, issued	23,645	23,639
Treasury stock, shares	6,498	6,475