SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule Of Property, Plant And Equipment Balances And Corresponding Lives) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 413,208	$ 373,697
Less: Accumulated depreciation	(190,839)	(168,516)
Property, plant and equipment, net	222,369	205,181
Land
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	2,147	2,189
Buildings and building improvements
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 17,677	17,611
Buildings and building improvements | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Buildings and building improvements | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	40 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 82,432	75,575
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	1 year
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	20 years
Machinery and production equipment
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 103,818	103,083
Machinery and production equipment | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Machinery and production equipment | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	20 years
Surgical instrument kits
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 19,871	15,916
Surgical instrument kits | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	4 years
Surgical instrument kits | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Information systems and hardware
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 111,145	93,742
Information systems and hardware | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	1 year
Information systems and hardware | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	7 years
Furniture, fixtures, and office equipment
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 16,896	15,010
Furniture, fixtures, and office equipment | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	1 year
Furniture, fixtures, and office equipment | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	15 years
Construction-in-progress
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 59,222	$ 50,571