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Related-party Transactions (Details 1) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Related Party Transaction [Line Items]      
Revenues from related parties, net $ 0 $ 0 $ 86,555
Display driver for large-size applications [Member]      
Related Party Transaction [Line Items]      
Revenues from related parties, net     54,813
Display driver for consumer electronics applications [Member]      
Related Party Transaction [Line Items]      
Revenues from related parties, net     24,965
Display driver for mobile handsets [Member]      
Related Party Transaction [Line Items]      
Revenues from related parties, net     1,863
Others [Member]      
Related Party Transaction [Line Items]      
Revenues from related parties, net     $ 4,914