PROPERTY AND EQUIPMENT (Schedule of Property and Equipment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property and equipment	$ 541,055	$ 526,651
Less: accumulated depreciation	(313,514)	(305,575)
Total	227,541	221,076
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	8,286	8,296
Building and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 46,718	44,672
Useful Life	31 years 6 months
Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 117,052	113,301
Instruments [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 289,427	285,762
Useful Life	5 years
Modules and cases [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 45,047	44,185
Useful Life	5 years
Other Property and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 34,525	$ 30,435
Maximum [Member] | Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful Life	15 years
Maximum [Member] | Other Property and Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful Life	5 years
Minimum [Member] | Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful Life	5 years
Minimum [Member] | Other Property and Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful Life	3 years