INCOME TAXES (Schedule of Effective Tax Rate Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
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	(0.20%)	1.30%	5.60%
Foreign operations	(10.00%)	(12.50%)	(16.70%)
Spine valuation allowance	0.00%	61.10%	0.00%
Excess tax benefits from stock compensation	(3.90%)	0.00%	0.00%
Charitable contributions	(0.40%)	(1.00%)	(2.70%)
Domestic production activities deduction	(2.60%)	(2.40%)	(2.70%)
Intercompany profit in inventory	1.00%	3.10%	(0.40%)
Nondeductible facilitative costs	0.20%	3.10%	1.10%
Changes in valuation allowances	0.40%	0.30%	2.10%
Uncertain tax positions	(0.30%)	0.20%	(3.40%)
Research and development credit	(1.20%)	(1.90%)	(1.80%)
Return to provision	(1.50%)	1.70%	1.40%
Other	1.00%	0.70%	2.80%
Effective tax rate	17.50%	88.70%	20.30%