Equity and Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance			$ (32,867)	$ (255)
Other comprehensive income (loss) before reclassifications			(4,162)	4,485
Amounts reclassified from accumulated other comprehensive (loss) income			44	(11,981)
Total other comprehensive loss	$ (5,356)	$ (11,445)	(4,118)	(7,496)
Accumulated other comprehensive (loss) income, ending balance	(36,985)	(7,751)	(36,985)	(7,751)
Defined Benefit Pension [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance			(2,525)	(1,013)
Other comprehensive income (loss) before reclassifications			0	0
Amounts reclassified from accumulated other comprehensive (loss) income			44	606
Total other comprehensive loss			44	606
Accumulated other comprehensive (loss) income, ending balance	(2,481)	(407)	(2,481)	(407)
Foreign Currency Translation [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance			(513)	11,451
Other comprehensive income (loss) before reclassifications			(112)	779
Amounts reclassified from accumulated other comprehensive (loss) income			0	(12,587)
Total other comprehensive loss			(112)	(11,808)
Accumulated other comprehensive (loss) income, ending balance	(625)	(357)	(625)	(357)
Equity Interest in J-Devices' Other Comprehensive Income (Loss) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance			(29,829)	(10,693)
Other comprehensive income (loss) before reclassifications			(4,050)	3,706
Amounts reclassified from accumulated other comprehensive (loss) income			0	0
Total other comprehensive loss			(4,050)	3,706
Accumulated other comprehensive (loss) income, ending balance	$ (33,879)	$ (6,987)	$ (33,879)	$ (6,987)