CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Par value of common stock (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares outstanding (in shares)	50,280,826	50,037,206
Common stock, shares issued (in shares)	50,942,207	50,698,587
Treasury stock (in shares)	661,381	661,381
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	1	1
Preferred stock, shares outstanding (in shares)	1	1
Allowance for Doubtful Accounts Receivable	$ 1,422	$ 1,242
Treasury Stock
Par value of common stock (in dollars per share)	$ 0.0001	$ 0.0001