CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
CURRENT ASSETS:
Trade receivables, allowances	$ 1,587	$ 1,297
STOCKHOLDERS’ EQUITY:
Preferred stock shares authorized (in shares)	5,000,000	5,000,000
Preferred stock shares issued (in shares)	0	0
Common stock par value (in USD per share)
Common stock shares authorized (in shares)	100,000,000	100,000,000
Common stock shares issued (in shares)	44,645,000	44,267,000
Common stock shares outstanding (in shares)	44,645,000	44,267,000
Developed technology
OTHER ASSETS:
Intangibles, accumulated amortization	$ 52,843	$ 38,497
Other
OTHER ASSETS:
Intangibles, accumulated amortization	$ 30,048	$ 26,603