Equity and Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss) income, beginning balance		$ (2,084)		$ (2,084)	$ (32,471)
Other comprehensive income (loss) before reclassifications				52,161	407
Amounts reclassified from accumulated other comprehensive (loss) income				71	66
Total other comprehensive income (loss)	$ 5,907	19,347	$ 4,426	52,232	473
Accumulated other comprehensive (loss) income, ending balance	50,148		(31,998)	50,148	(31,998)
Defined Benefit Pension [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss) income, beginning balance		(1,425)		(1,425)	(2,525)
Other comprehensive income (loss) before reclassifications				0	0
Amounts reclassified from accumulated other comprehensive (loss) income				71	66
Total other comprehensive income (loss)				71	66
Accumulated other comprehensive (loss) income, ending balance	(1,354)		(2,459)	(1,354)	(2,459)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss) income, beginning balance		$ (659)		(659)	(513)
Other comprehensive income (loss) before reclassifications				52,161	(102)
Amounts reclassified from accumulated other comprehensive (loss) income				0	0
Total other comprehensive income (loss)				52,161	(102)
Accumulated other comprehensive (loss) income, ending balance	$ 51,502		(615)	$ 51,502	(615)
Equity Interest in J-Devices' Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss) income, beginning balance					(29,433)
Other comprehensive income (loss) before reclassifications					509
Amounts reclassified from accumulated other comprehensive (loss) income					0
Total other comprehensive income (loss)					509
Accumulated other comprehensive (loss) income, ending balance			$ (28,924)		$ (28,924)