Equity and Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	$ (32,867)	$ (255)
Other comprehensive income (loss) before reclassifications	1,216	3,829
Amounts reclassified from accumulated other comprehensive (loss) income	22	120
Total other comprehensive income	1,238	3,949
Accumulated other comprehensive (loss) income, ending balance	(31,629)	3,694
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	22	120
Total other comprehensive income	22	120
Accumulated other comprehensive (loss) income, ending balance	(2,503)	(893)
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	(122)	685
Amounts reclassified from accumulated other comprehensive (loss) income	0	0
Total other comprehensive income	(122)	685
Accumulated other comprehensive (loss) income, ending balance	(635)	12,136
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	1,338	3,144
Amounts reclassified from accumulated other comprehensive (loss) income	0	0
Total other comprehensive income	1,338	3,144
Accumulated other comprehensive (loss) income, ending balance	$ (28,491)	$ (7,549)