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Commitments and Contingencies Litigation (Details)
 0 Months Ended
Sep. 07, 2012
Cooper Lighting, LLC [Member]
Patents
Apr. 02, 2010
Cooper Lighting, LLC [Member]
Patents
Jun. 07, 2010
Illumination Management Solutions, Inc. [Member]
Patents
Jun. 29, 2010
The Fox Group, Inc. [Member]
Patents
Apr. 29, 2009
Pending Litigation
Dynacraft Industries Litigation
USD ($)
Apr. 29, 2009
Pending Litigation
Dynacraft Industries Litigation
MYR
Loss Contingencies [Line Items]            
Gain Contingency, Patents Allegedly Infringed upon, Number   2        
Loss Contingency, Patents Allegedly Infringed, Number 1   2 2    
Contract Price, Real Property         $ 12,000,000 38,000,000