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Investments Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended 6 Months Ended
Jan. 31, 2015
Jun. 30, 2014
Apr. 30, 2013
Oct. 31, 2009
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Mar. 31, 2013
Schedule of Equity Method Investments [Line Items]                
Payments to Acquire Businesses and Interest in Affiliates         $ 12,908 $ 0    
Japanese Subsidiary [Member]                
Schedule of Equity Method Investments [Line Items]                
Sale of Stock, Percentage of Ownership before Transaction   100.00%            
J-Devices [Member]                
Schedule of Equity Method Investments [Line Items]                
Ownership interest 65.70%   60.00%   65.70%   60.00% 30.00%
Payments to Acquire Businesses and Interest in Affiliates $ 12,900   $ 67,400 $ 16,700        
Ownership Threshold 2015 [Member] | J-Devices [Member]                
Schedule of Equity Method Investments [Line Items]                
Maximum ownership ratio of call options         80.00%      
Minimum ownership threshold, put option         80.00%      
Former NMD Shareholders [Member] | J-Devices [Member]                
Schedule of Equity Method Investments [Line Items]                
Ownership interest         34.30%