Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Trade and other accounts receivable, allowance	$ 303	$ 252
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	31,944,000	31,782,000
Common stock, shares outstanding	31,944,000	31,782,000