Revision of Previously Reported Financial Information Statement of Cash Flow (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income	$ 167,304	$ 53,893	$ 133,240
Equity in earnings of unconsolidated affiliate	0	(14,016)	(31,007)
Loss from acquisition of J-Devices	$ 0	13,501	0
Scenario, Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		59,607	133,887
Equity in earnings of unconsolidated affiliate		(20,107)	(31,654)
Loss from acquisition of J-Devices		13,878	0
Scenario, Adjustment [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		(5,714)	(647)
Equity in earnings of unconsolidated affiliate		6,091	647
Loss from acquisition of J-Devices		$ (377)	$ 0