CONSOLIDATED BALANCE SHEETS (PARENTHETICAL) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 490	$ 722
Preferred Stock, Par or Stated Value Per Share	$ 0.001
Preferred Stock, Shares Authorized	5,000,000
Preferred Stock, Shares Issued		0
Common Stock, Par or Stated Value Per Share	$ 0.001
Common Stock, Shares Authorized	100,000,000
Common Stock, Shares, Issued	41,842,113	39,493,469
Common Stock, Shares, Outstanding	35,005,492	33,541,493
Treasury Stock, Shares	6,836,621	5,951,976