Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Roll Forward]
Balance at beginning of period	$ 43,132	$ 34,866
Exchange rate effects	(1,950)	281
Goodwill impairment	0	0	0
Balance at end of period	144,359	43,132	34,866
Finite-Lived Intangible Assets [Line Items]
Indefinite-Lived Trade Names	20,359	20,359
Intangible Assets Subject to Amortization	357,307	286,086
Accumulated amortization	(191,053)	(176,494)
Net Intangible Assets Subject to Amortization	166,254	109,592
Intangible assets, net	186,613	129,951
Amortization expense (excluding capitalized software)	18,651	15,068	14,754
Finite Lived Intangible Assets Future Amortization Expense [Abstract]
2015	27,235
2016	25,593
2017	21,757
2018	18,377
2019	14,396
Patents and Acquired Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets Subject to Amortization	108,190	92,842
Accumulated amortization	(71,700)	(66,337)
Capitalized Software [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets Subject to Amortization	53,369	55,893
Accumulated amortization	(45,979)	(50,006)
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets Subject to Amortization	153,853	99,558
Accumulated amortization	(50,630)	(40,727)
Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets Subject to Amortization	39,612	35,845
Accumulated amortization	(21,384)	(18,560)
Non-competition Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets Subject to Amortization	2,283	1,948
Accumulated amortization	(1,360)	(864)
HiRel Systems [Member]
Goodwill [Roll Forward]
Goodwill acquired during period			25,815
Other intangible assets related to acquisitions			43,950
MCB Industrie [Member]
Goodwill [Roll Forward]
Goodwill acquired during period		7,985
Other intangible assets related to acquisitions		5,433
Capella Microsystems (Taiwan) Inc. [Member]
Goodwill [Roll Forward]
Goodwill acquired during period	96,849
Holy Stone Polytech [Member]
Goodwill [Roll Forward]
Goodwill acquired during period	6,328
Other intangible assets related to acquisitions	3,736
Resistors And Inductors Segment [Member]
Goodwill [Roll Forward]
Balance at beginning of period	43,132	34,866
Exchange rate effects	(986)	281
Balance at end of period	42,146	43,132
Resistors And Inductors Segment [Member] | MCB Industrie [Member]
Goodwill [Roll Forward]
Goodwill acquired during period		7,985
Resistors And Inductors Segment [Member] | Capella Microsystems (Taiwan) Inc. [Member]
Goodwill [Roll Forward]
Goodwill acquired during period	0
Resistors And Inductors Segment [Member] | Holy Stone Polytech [Member]
Goodwill [Roll Forward]
Goodwill acquired during period	0
Capacitors Segment [Member]
Goodwill [Roll Forward]
Balance at beginning of period	0	0
Exchange rate effects	(964)	0
Balance at end of period	5,364	0
Capacitors Segment [Member] | MCB Industrie [Member]
Goodwill [Roll Forward]
Goodwill acquired during period		0
Capacitors Segment [Member] | Capella Microsystems (Taiwan) Inc. [Member]
Goodwill [Roll Forward]
Goodwill acquired during period	0
Capacitors Segment [Member] | Holy Stone Polytech [Member]
Goodwill [Roll Forward]
Goodwill acquired during period	6,328
Optoelectronic Components Segment [Member]
Goodwill [Roll Forward]
Balance at beginning of period	0	0
Exchange rate effects	0	0
Balance at end of period	96,849	0
Optoelectronic Components Segment [Member] | MCB Industrie [Member]
Goodwill [Roll Forward]
Goodwill acquired during period		0
Optoelectronic Components Segment [Member] | Capella Microsystems (Taiwan) Inc. [Member]
Goodwill [Roll Forward]
Goodwill acquired during period	96,849
Optoelectronic Components Segment [Member] | Holy Stone Polytech [Member]
Goodwill [Roll Forward]
Goodwill acquired during period	$ 0