SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Description of Business (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2019
Foreign Currency Transaction and Translation Gains/Losses, Selling and Marketing Expense	$ 500	$ 5,100	$ (600)
Accounts Receivable Percentage Not Attained by Individual Customer	10.00%
Payments for Restructuring	$ 5,258	$ 10,548	$ 8,693
Net Assets	$ (166,700)
Other Intangible Assets [Member] | Minimum Estimated Useful Life of Intangible Assets [Member]
Finite-Lived Intangible Asset, Useful Life	2 years
Other Intangible Assets [Member] | Maximum Estimated Useful Life of Intangible Assets [Member]
Finite-Lived Intangible Asset, Useful Life	12 years
Software Development [Member]
Capitalized software costs, expected life, minimum (in months)	12
Capitalized software costs, expected useful life, maximum (in months)	36
Minimum [Member]
Extended Product Warranty Description	90 days to one year
Maximum [Member]
Extended Product Warranty Description	5 years
Maximum [Member]
Operating Lease, Right-of-Use Asset				$ 40,000
Operating Lease, Liability				45,000
Minimum [Member]
Operating Lease, Right-of-Use Asset				36,000
Operating Lease, Liability				$ 41,000