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PROVISION FOR INCOME TAXES (Tables) | 12 Months Ended
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Dec. 31, 2016
Income Tax Disclosure [Abstract] |
U.S. and foreign components of income before income taxes [Table Text Block] | U.S. and foreign components of income before income taxes were:
| Year Ended December 31,
(in thousands) | 2016 |  | 2015 |  | 2014
U.S. operations | $ | (880 | ) |  | $ | (2,113 | ) |  | $ | (5,064 | )
Foreign operations | 49,802 |  |  | 41,531 |  |  | 61,878 |
Total pretax income | $ | 48,922 |  |  | $ | 39,418 |  |  | $ | 56,814 |
Components of provision for income taxes [Table Text Block] | The components of the provision for (benefit from) income taxes are as follows:
| Year Ended December 31,
(in thousands) | 2016 |  | 2015 |  | 2014
Current provision (benefit): |  |  |  |  |
Federal | $ | — |  |  | $ | 443 |  |  | $ | (1,234 | )
State | — |  |  | 83 |  |  | (137 | )
Foreign | 1,638 |  |  | 5,407 |  |  | 3,094 |
| 1,638 |  |  | 5,933 |  |  | 1,723 |
Deferred provision (benefit): |  |  |  |  |
Federal | (197 | ) |  | (1,699 | ) |  | (3,279 | )
State | (27 | ) |  | (57 | ) |  | (284 | )
Foreign | (382 | ) |  | (3,906 | ) |  | (890 | )
| (606 | ) |  | (5,662 | ) |  | (4,453 | )
Total | $ | 1,032 |  |  | $ | 271 |  |  | $ | (2,730 | )
Effective income tax rate reconciliation [Table Text Block] | The provision for (benefit from) income taxes differs from the amount that would result by applying the applicable federal income tax rate to income before provision for (benefit from) income taxes, as follows:
| Year Ended December 31,
| 2016 |  | 2015 |  | 2014
Provision computed at Federal statutory rate | 35.0 | % |  | 35.0 | % |  | 35.0 | %
Business tax credits | (6.0 | ) |  | (6.8 | ) |  | (5.5 | )
Stock-based compensation | 2.2 |  |  | 0.8 |  |  | (2.9 | )
Foreign income taxed at different rate | (33.1 | ) |  | (33.1 | ) |  | (28.6 | )
IRS audit settlement | — |  |  | — |  |  | (5.8 | )
Valuation allowance | 1.8 |  |  | 2.6 |  |  | 2.0 |
Other | 2.2 |  |  | 2.2 |  |  | 1.0 |
Total | 2.1 | % |  | 0.7 | % |  | (4.8 | )%
Components of net deferred income tax asset [Table Text Block] | The components of the net deferred income tax asset (liabilities) were as follows:
| December 31,
(in thousands) | 2016 |  | 2015
Deferred tax assets: |  |  |
Other reserves and accruals | $ | 1,880 |  |  | $ | 1,573 |
Tax credit carry-forwards | 26,895 |  |  | 22,826 |
Stock compensation | 5,760 |  |  | 5,945 |
Capital losses | 10,585 |  |  | 11,490 |
Net operating loss | 2,671 |  |  | 3,677 |
Other | 174 |  |  | — |
Valuation allowance | (27,489 | ) |  | (26,918 | )
| 20,476 |  |  | 18,593 |
Deferred tax liabilities: |  |  |
Depreciation | (2,322 | ) |  | (2,968 | )
Unremitted earnings | (7,019 | ) |  | (4,626 | )
Other | — |  |  | (447 | )
| (9,341 | ) |  | (8,041 | )
Net deferred tax asset | $ | 11,135 |  |  | $ | 10,552 |
Unrecognized tax benefits rollforward [Table Text Block] | The Company applies the provisions of ASC 740-10, relating to accounting for uncertain income taxes. Reconciliation of the beginning and ending amount of unrecognized tax benefits:
(in thousands) | Unrecognized Tax Benefits
Unrecognized Tax Benefits Balance at January 1, 2014 | $ | 12,694 |
Gross Increases for Tax Positions of Current Year | 2,117 |
Gross Increases for Tax Positions of Prior Years | 710 |
Settlements | (4,361 | )
Lapse of Statute of Limitations | — |
Unrecognized Tax Benefits Balance at December 31, 2014 | 11,160 |
Gross Increases for Tax Positions of Current Year | 3,063 |
Gross Decrease for Tax Positions of Prior Years | (663 | )
Settlements | — |
Lapse of Statute of Limitations | — |
Unrecognized Tax Benefits Balance at December 31, 2015 | 13,560 |
Gross Increases for Tax Positions of Current Year | 1,856 |
Gross Decreases for Tax Positions of Prior Years | (23 | )
Settlements | — |
Lapse of Statute of Limitations | — |
Unrecognized Tax Benefits Balance at December 31, 2016 | $ | 15,393 |

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