Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Common stock, par value per share (in dollars per share) $ 0.0001 $ 0.0001
Common stock authorized (in shares) 200,000 200,000
Common stock issued (in shares) 52,692 51,804
Common stock outstanding (in shares) 52,962 51,804