CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Allowances for doubtful accounts receivable, current	$ 2,221	$ 2,052
Deferred tax assets valuation allowance, current	15,176	9,122
Deferred tax assets valuation allowance, non current	$ 104,101	$ 109,601
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	25,000,000	25,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	21,652,341	21,442,623
Common stock, shares outstanding	21,652,341	21,701,353