Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Statement of Financial Position [Abstract]
Trade and other accounts receivable, allowance	$ 341	$ 450
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	29,183,000	28,174,000
Common stock, shares outstanding	29,183,000	28,174,000