CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounts receivable, allowance for doubtful accounts	$ 622	$ 703
Common stock, par value
Common Stock, shares authorized	200,000,000	200,000,000
Common stock, issued	83,947,151	83,741,918
Common stock, outstanding	83,947,151	83,741,918
Restricted Stock
Common stock, issued	465,290	564,314
Common stock, outstanding	465,290	564,314