Condensed Consolidated Balance Sheets Parenthetical - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Allowances	$ 1,640	$ 1,279
Common Stock, Par Value (in dollars per share)	$ 0.001	$ 0.001
Common Stock, Shares, Authorized	100,000,000	100,000,000
Common Stock, Shares, Issued	44,252,000	43,540,000
Common Stock, Shares, Outstanding	35,851,000	35,816,000
Treasury Stock, Shares	8,401,000	7,721,000