Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies Legal Matters (Details)

v2.4.1.9
Commitments and Contingencies Legal Matters (Details) (USD $)
In Millions, unless otherwise specified
 0 Months Ended 12 Months Ended
Dec. 28, 2012
patent
customer
Dec. 31, 2014
Pending Litigation | Advanced Media Networks, LLC, Patent Infringement    
Loss Contingencies [Line Items]    
Number of customers named additionally 1us-gaap_LossContingencyNumberOfDefendants
/ us-gaap_LitigationCaseAxis
= ent_AdvancedMediaNetworksLLCPatentInfringementMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember 		 
Number of patent infringements 2ent_NumberofPatentInfringements
/ us-gaap_LitigationCaseAxis
= ent_AdvancedMediaNetworksLLCPatentInfringementMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember 		 
Settled Litigation    
Loss Contingencies [Line Items]    
Litigation settlement amount   $ 8.3us-gaap_LitigationSettlementAmount
/ us-gaap_LitigationStatusAxis
= us-gaap_SettledLitigationMember