BASIS OF PRESENTATION (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)	Mar. 31, 2016 USD ($) VEB / $	Sep. 30, 2015 VEB / $	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Venezuela-Highly Inflationary Economy
Venezuela foreign currency transaction loss	$ 4,334
Inventory Write-down	22,880
DICOMRate | VEB / $		272.9	199.4
Net bolivar-denominated monetary assets position	32	$ (748)
Cash and cash equivalents	304,183	220,996		$ 289,017	$ 278,379
VENEZUELA
Venezuela-Highly Inflationary Economy
Cash and cash equivalents	$ 642	$ 510