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SELECTED QUARTERLY INFORMATION (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 02, 2015 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
NET REVENUES |  |  | $ 101,108 | $ 103,790 | $ 97,169 | $ 85,326 | $ 87,289 | $ 88,878 | $ 85,265 | $ 82,557 | $ 387,393 | $ 343,989 | $ 348,797
Gross Profit |  |  | 49,384 | 51,193 | 47,637 | 42,947 | 42,916 | 44,161 | 44,018 | 42,292 | 191,161 | 173,387 | 189,570
Net income |  |  | $ 13,617 | $ 14,165 | $ 11,265 | $ 8,843 | $ 12,701 | $ 11,513 | $ 8,590 | $ 6,343 | $ 47,890 | $ 39,147 | $ 59,544
Earnings per share |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (per share) |  |  | $ 0.47 | $ 0.49 | $ 0.39 | $ 0.31 | $ 0.45 | $ 0.40 | $ 0.29 | $ 0.22 | $ 1.66 | $ 1.35 | $ 1.99
Diluted (per share) | [1] |  | $ 0.46 | $ 0.48 | $ 0.38 | $ 0.30 | $ 0.44 | $ 0.39 | $ 0.29 | $ 0.21 | $ 1.62 | $ 1.32 | $ 1.93
Shares used in per share calculation |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (in shares) |  |  | 29,196 | 28,972 | 28,850 | 28,679 | 28,483 | 28,855 | 29,368 | 29,309 | 28,925 | 29,001 | 29,976
Diluted (in shares) | [1] |  | 29,914 | 29,625 | 29,422 | 29,244 | 29,126 | 29,298 | 30,034 | 30,058 | 29,619 | 29,696 | 30,829
Cambridge Semiconductor Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
CamSemi Purchase Price |  | $ 23,300 |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  | 16,700 |  |  |  |  |  |  |  |  |  |  |
Consideration applied against outstanding loan |  | 6,600 |  |  |  |  |  |  |  |  |  |  |
Business Combination, Accumulated Acquisition Related Costs |  | $ 1,000 | $ 1,000 |  |  |  |  |  |  |  | $ 1,000 |  |
Business Combination, Acquisition Related Costs |  |  |  |  |  |  |  |  |  |  |  | $ 200 | $ 800
[1] | The Company includes the shares underlying performance-based awards in the calculation of diluted earnings per share if the performance conditions have been satisfied as of the end of the reporting period and excludes such shares when the necessary conditions have not been met. The Company has excluded all performance-based awards in the 2014 calculation as the performance conditions for those awards were not met as of the end of the period. The Company has included in the 2016 and 2015 calculations those shares that were contingently issuable upon the satisfaction of the performance conditions as of the end of the respective periods.

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