Restructuring and Related Activities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended						12 Months Ended
	Dec. 31, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 31, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Belguim [Member]	Dec. 31, 2013 Belguim [Member]	Apr. 03, 2012 Belguim [Member]	Dec. 31, 2013 MOSFETs Enhanced Competitiveness Program [Member]	Dec. 31, 2013 Voluntary Separation/Retirement Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related expense	$ 2,814	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 2,814						$ 2,328	$ 486
Restructuring Reserve [Roll Forward]
Restructuring and severance costs									2,814	0	0
Term of restructuring program															2 years
Expected Restructuring Costs									32,000						16,000
Long-Lived Assets [Line Items]
Accounts receivable, net	274,083				247,035				274,083	247,035			3,586
Gain on Sale of Property	0	0	0	0	0	0	(12,153)	0	0	(12,153)	0	12,153
Proceeds from sale of long lived assets held for sale									4,681	10,241	2,162	3,406
Sale price of long lived assets held for sale														$ 14,200