Accumulated Other Comprehensive Income and Loss (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss) income	$ (32,867)	$ (255)	$ 11,241
Other comprehensive income (loss) before reclassifications	(20,237)	(11,860)
Amounts reclassified from accumulated other comprehensive (loss) income	(12,375)	364
Total other comprehensive (loss) income	(32,612)	(11,496)	392
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss) income	(2,525)	(1,013)	(5,373)
Other comprehensive income (loss) before reclassifications	(1,724)	3,996
Amounts reclassified from accumulated other comprehensive (loss) income	212	364
Total other comprehensive (loss) income	(1,512)	4,360
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss) income	(513)	11,451	16,346
Other comprehensive income (loss) before reclassifications	623	(4,895)
Amounts reclassified from accumulated other comprehensive (loss) income	(12,587)	0
Total other comprehensive (loss) income	(11,964)	(4,895)
Equity Interest in J-Devices' Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss) income	(29,829)	(10,693)	268
Other comprehensive income (loss) before reclassifications	(19,136)	(10,961)
Amounts reclassified from accumulated other comprehensive (loss) income	0	0
Total other comprehensive (loss) income	$ (19,136)	$ (10,961)