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INCOME TAXES (Schedule of Effective Tax Rate Reconciliation) (Details) | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Income Tax Disclosure [Abstract] |  |  |
Federal statutory rate | 35.00% | 35.00% | 35.00%
Increase (decrease) in income taxes resulting from: |  |  |
State income taxes, net of federal tax benefit | 1.30% | 5.60% | 0.20%
Foreign operations | (12.50%) | (16.70%) | (27.20%)
Spine valuation allowance | 61.10% | 0.00% | 0.00%
Charitable contributions | (1.00%) | (2.70%) | (0.90%)
Domestic production activities deduction | (2.40%) | (2.70%) | (0.00%)
Intercompany profit in inventory | 3.10% | (0.40%) | (1.40%)
Nondeductible facilitative costs | 3.10% | 1.10% | 0.00%
Changes in valuation allowances | 0.30% | 2.10% | 1.50%
Uncertain tax positions | 0.20% | (3.40%) | (13.80%)
Research and development credit | (1.90%) | (1.80%) | (5.70%)
Return to provision | 1.70% | 1.40% | (9.80%)
Other | 0.70% | 2.80% | 4.80%
Effective tax rate | 88.70% | 20.30% | (17.30%)

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