Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 1,671	$ 766
Common stock, shares issued	153,584,564	152,331,006
Common stock, shares outstanding	153,584,564	152,331,006
Common stock, par value (in usd per share)	$ 0.10	$ 0.10
Common stock, shares authorized	200,000,000	200,000,000