FINANCIAL INFORMATION Financial Information (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Inventory, Net	$ 32,887	$ 38,421
Assets	250,781	234,684
Accounts receivable, net of allowances of $1,268 and $11,143 at March 31, 2018 and December 31, 2017, respectively	52,532	40,134
Long-term deferred revenues	16,953	73,429
Liabilities	422,411	503,254
Deferred Revenue, Current	89,420	121,184
Accumulated deficit	(1,189,102)	(1,284,703)
Stockholders' Equity Attributable to Parent	$ (171,630)	(268,570)
Accounting Standards Update 2014-09 [Member]
Inventory, Net		32,705
Assets		257,500
Accounts receivable, net of allowances of $1,268 and $11,143 at March 31, 2018 and December 31, 2017, respectively		61,222
Long-term deferred revenues		18,350
Liabilities		421,520
Deferred Revenue, Current		83,390
Accumulated deficit		(1,180,153)
Stockholders' Equity Attributable to Parent		$ (164,020)