SUMMARY OF PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, plant and equipment
Total property, plant and equipment	$ 528,312	$ 491,842
Less: accumulated depreciation	(297,777)	(259,445)
Net property, plant and equipment	230,535	232,397
Depreciation expense	47,000	45,500	$ 42,800
Land, Buildings and Improvements
Property, plant and equipment
Total property, plant and equipment	70,487	69,165
Machinery and equipment
Property, plant and equipment
Total property, plant and equipment	150,809	140,939
Leasehold Improvements
Property, plant and equipment
Total property, plant and equipment	139,448	132,378
Furniture and fixtures
Property, plant and equipment
Total property, plant and equipment	106,722	101,823
Software
Property, plant and equipment
Total property, plant and equipment	54,506	42,909
Construction in Progress
Property, plant and equipment
Total property, plant and equipment	$ 6,340	$ 4,628