LEGAL PROCEEDINGS AND CONTINGENCIES (Details) $ in Millions																			1 Months Ended										12 Months Ended
	Sep. 22, 2017 patents	Dec. 27, 2016 patent	Dec. 12, 2016 patents	Nov. 01, 2016 patent	Aug. 11, 2016 patent	Apr. 01, 2016 patent	Oct. 21, 2015 patents	May 01, 2012 USD ($) patents	Feb. 03, 2011 USD ($)	May 05, 2010 patents	Dec. 18, 2009 patents	Nov. 04, 2009 patents patent	Dec. 22, 2008	Dec. 12, 2008 USD ($)	Nov. 07, 2008 patents	May 23, 2008 patents	Oct. 10, 2006 USD ($)	Oct. 20, 2004 patents	Nov. 30, 2017 USD ($)	Mar. 31, 2017 patent	Jan. 31, 2017 USD ($)	Dec. 31, 2015 USD ($)	Jun. 30, 2015 patent	Feb. 28, 2014 USD ($) patents patent	Dec. 31, 2012 patents	Apr. 30, 2012 patents	May 31, 2010 patents	Feb. 28, 2010 USD ($) patents	Dec. 31, 2017 patents
Patent Inter Partes Review Petition Request One [Domain]
Gain and Loss Contingencies [Line Items]
Number of Patents in Inter Partes Review Petition Request																													11
Counterclaims [Member] | Patent Infringement Claim Three Counterclaim [Member]
Gain and Loss Contingencies [Line Items]
Loss Contingency, Patents Allegedly Infringed, Number										2																	1
Counterclaims [Member] | Patent Infringment Claim Five [Member]
Gain and Loss Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value | $								$ 2.4
Gain Contingency, Patents Allegedly Infringed upon, Number								5
Judicial Ruling [Member] | Patent Infringement Claim Two [Member]
Gain and Loss Contingencies [Line Items]
Gain Contingency, Patents Found Infringed upon, Number																										2
Judicial Ruling [Member] | Patent Infringement Claim Two Counterclaim [Member]
Gain and Loss Contingencies [Line Items]
Loss Contingency, Patents Found Not Infringed, Number																										1
Number of Patents Found Invalid			1
Judicial Ruling [Member] | Patent Infringement Claim Four [Member]
Gain and Loss Contingencies [Line Items]
Loss Contingency, Patents Found Not Infringed, Number																									4
Judicial Ruling [Member] | Patent Infringment Claim Five [Member]
Gain and Loss Contingencies [Line Items]
Gain Contingency, Patents Found Infringed upon, Number | patent																							1
Judicial Ruling [Member] | Patent Inter Partes Review Petition Request One [Domain]
Gain and Loss Contingencies [Line Items]
Number of Patents Denied Inter Partes Review Proceedings	3
Number of Patents in Inter Partes Review Proceedings	8
Pending Litigation [Member] | Patent Infringement Claim One [Member]
Gain and Loss Contingencies [Line Items]
Period for petition for further stay of permanent injunction													90 days
Pending Litigation [Member] | Patent Infringement Claim Two [Member]
Gain and Loss Contingencies [Line Items]
Gain Contingency, Patents Allegedly Infringed upon, Number																3
Pending Litigation [Member] | Patent Infringement Claim Two Counterclaim [Member]
Gain and Loss Contingencies [Line Items]
Number of patents withdrawn from infringement claims											1
Number of patents remaining in infringement claims			2								2															2
Percent of revenue impacted by patents involved in litigation																													0.50%
Loss Contingency, Patents Allegedly Infringed, Number															3
Pending Litigation [Member] | Patent Infringement Claim Three Counterclaim [Member]
Gain and Loss Contingencies [Line Items]
Number of patents withdrawn from infringement claims										1
Pending Litigation [Member] | Patent Infringement Claim Four [Member]
Gain and Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value | $																												$ 19.0
Loss Contingency, Patents Allegedly Infringed, Number																												4
Pending Litigation [Member] | Patent Infringment Claim Five [Member]
Gain and Loss Contingencies [Line Items]
Number of patents withdrawn from infringement claims								1
Loss Contingency, Patents Allegedly Infringed, Number								4
Pending Litigation [Member] | Patent Infringment Claim Six [Member]
Gain and Loss Contingencies [Line Items]
Gain Contingency, Patents Found Infringed upon, Number							2
Pending Litigation [Member] | Patent Infringement Claim Seven [Member]
Gain and Loss Contingencies [Line Items]
Loss Contingency, Patents Allegedly Infringed, Number | patent						1
Pending Litigation [Member] | Patent Infringement Claim Eight [Member]
Gain and Loss Contingencies [Line Items]
Loss Contingency, Patents Allegedly Infringed, Number | patent					6
Pending Litigation [Member] | Patent Infringement Claim Nine [Member]
Gain and Loss Contingencies [Line Items]
Gain Contingency, Patents Allegedly Infringed upon, Number | patent				6
Pending Litigation [Member] | Patent Infringement Claim Ten [Member]
Gain and Loss Contingencies [Line Items]
Loss Contingency, Patents Allegedly Infringed, Number | patent		6																		7
Pending Litigation [Member] | Patent Infringement Claim Eleven [Member]
Gain and Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value | $																			$ 1.0
Positive Outcome of Litigation [Member] | Patent Infringement Claim One [Member]
Gain and Loss Contingencies [Line Items]
Gain Contingency, Patents Found Infringed upon, Number																		4
Litigation Settlement, Amount | $									$ 12.9					$ 6.1			$ 34.0
Positive Outcome of Litigation [Member] | Patent Infringement Claim Three [Member]
Gain and Loss Contingencies [Line Items]
Litigation Settlement, Amount | $																					$ 146.5	$ 139.8		$ 105.0
Number of Patents in Infringement Case, Unenforceable | patent												1												1
Gain Contingency, Patents Allegedly Infringed upon, Number												2
Loss Contingency, Patents Allegedly Infringed, Number																								2