Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Trade accounts receivable, allowance for doubtful accounts	$ 2,584	$ 1,563
Common stock, par value	$ 0.01	$ 0.01
Common stock, issued	112,193	78,031
Common stock, outstanding	112,193	78,031