v3.2.0.727
Variable Interest Entities (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Variable Interest Entity, Consolidated, Carrying Amount, Assets $ 16,600   $ 16,600  
Net Income (Loss) Attributable to Noncontrolling Interest (647) $ (789) (1,380) $ (1,483)
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities 600   600  
Cash and Cash Equivalents [Member]        
Variable Interest Entity, Consolidated, Carrying Amount, Assets 12,100   12,100  
Patents [Member]        
Variable Interest Entity, Consolidated, Carrying Amount, Assets $ 4,400   $ 4,400