CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accounts receivable, allowance for doubtful receivables	$ 469	$ 622
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, authorized	500,000	500,000
Preferred stock, issued	0	0
Preferred stock, outstanding	0
Common stock, par value	$ 0.10	$ 0.10
Common stock, authorized	30,000	30,000
Common stock, issued	23,785	23,645
Treasury stock, shares	6,821	6,498