Condensed Consolidated Balance Sheets (Unaudited) Parenthetical - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Allowances	$ 1,116	$ 1,240
Preferred Stock, Shares, Issued (in shares)	0	0
Preferred Stock, Par Value (in dollars per share)	$ 0.001	$ 0.001
Preferred Stock, Shares, Authorized (in shares)	5,000,000	5,000,000
Common Stock, Par Value (in dollars per share)	$ 0.001	$ 0.001
Common Stock, Shares, Authorized (in shares)	100,000,000	100,000,000
Common Stock, Shares, Issued (in shares)	45,276,000	44,739,000
Common Stock, Shares, Outstanding (in shares)	36,131,000	35,594,000
Treasury Stock, Shares (in shares)	9,145,000	9,145,000