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Investments Narrative (Details) (USD $)
9 Months Ended 1 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Apr. 30, 2013
J-Devices [Member]
Oct. 31, 2009
J-Devices [Member]
Sep. 30, 2014
J-Devices [Member]
Dec. 31, 2013
J-Devices [Member]
Mar. 31, 2013
J-Devices [Member]
Sep. 30, 2014
Ownership Threshold 2014 [Member]
J-Devices [Member]
Sep. 30, 2014
Ownership Threshold 2015 [Member]
J-Devices [Member]
Sep. 30, 2014
Former NMD Shareholders [Member]
J-Devices [Member]
Sep. 30, 2014
Toshiba [Member]
J-Devices [Member]
Schedule of Equity Method Investments [Line Items]                      
Ownership interest     60.00%   60.00% 60.00% 30.00%     34.00% 6.00%
Payments to acquire equity method investments (in dollars and yen)       $ 16,700,000              
Payments to Acquire Businesses and Interest in Affiliates $ 0 $ 67,372,000 $ 67,400,000                
Maximum ownership ratio of call options               66.00% 80.00%    
Minimum ownership threshold, put option                 80.00%