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%)