RESTRUCTURING COSTS AND ACCRUALS (Details) $ in Thousands	3 Months Ended			4 Months Ended	19 Months Ended
	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Mar. 31, 2015 USD ($)	Mar. 31, 2016 USD ($)	Jun. 30, 2017 USD ($)
Restructuring accrual [Roll Forward]
Accrual balance at beginning of year	$ 7,180
New restructuring charges - operating expenses	2,777		$ 0
Accretion	66
Cash payments	(2,781)
Foreign exchange impact on ending balance	0
Accrual balance at end of period	7,242	$ 7,180		$ 7,242
Facilities-related accruals - non-current	568	647		568
Employee-Related [Member]
Restructuring accrual [Roll Forward]
Accrual balance at beginning of year	5,509
New restructuring charges - operating expenses	2,777
Accretion	0
Cash payments	(2,454)
Foreign exchange impact on ending balance	(12)
Accrual balance at end of period	5,820	5,509		5,820
Facilities-Related [Member]
Restructuring accrual [Roll Forward]
Accrual balance at beginning of year	1,671
New restructuring charges - operating expenses	0
Accretion	66
Cash payments	(327)
Foreign exchange impact on ending balance	12
Accrual balance at end of period	1,422	1,671		1,422
Facilities-related accruals - current	800			800
Facilities-related accruals - non-current	600			600
2016 Plan [Member]
Restructuring accrual [Roll Forward]
Forecasted Restructuring-Related Cost Savings	68,000			68,000
2016 Plan [Member] | Employee-Related [Member]
Restructuring accrual [Roll Forward]
New restructuring charges - operating expenses	$ 2,800	$ 5,800		$ 8,600
Restructuring and Related Cost, Number of Positions Eliminated	63	111
Scenario, Forecast [Member] | 2016 Plan [Member]
Restructuring accrual [Roll Forward]
New restructuring charges - operating expenses					$ 14,000
Estimated Restructuring-Related Cash Expenditures					$ 25,000