Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Trade and other accounts receivable, allowance	$ 167	$ 157
Common stock, par value	$ 0.10	$ 0.1000
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	29,562,000	29,162,000
Common stock, shares outstanding	29,562,000	29,162,000