Segment and Geographic Area Information - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Net revenues	$ 1,226,583	$ 1,159,912	$ 1,134,671	$ 1,086,305	$ 1,010,800	$ 945,144	$ 931,558	$ 902,423	$ 4,607,471	$ 3,789,925	$ 3,582,395
Canada | Reportable Geographical Components
Segment Reporting Information [Line Items]
Net revenues									187,107	157,607	158,952
Canada | Reportable Geographical Components | RF Technology
Segment Reporting Information [Line Items]
Net revenues									73,356	52,703	45,506
Canada | Reportable Geographical Components | Medical & Scientific Imaging
Segment Reporting Information [Line Items]
Net revenues									23,501	21,993	23,737
Canada | Reportable Geographical Components | Industrial Technology
Segment Reporting Information [Line Items]
Net revenues									64,079	60,551	65,826
Canada | Reportable Geographical Components | Energy Systems & Controls
Segment Reporting Information [Line Items]
Net revenues									26,171	22,360	23,883
Europe | Reportable Geographical Components
Segment Reporting Information [Line Items]
Net revenues									596,240	507,992	452,238
Europe | Reportable Geographical Components | RF Technology
Segment Reporting Information [Line Items]
Net revenues									140,348	71,673	57,581
Europe | Reportable Geographical Components | Medical & Scientific Imaging
Segment Reporting Information [Line Items]
Net revenues									244,031	228,058	167,698
Europe | Reportable Geographical Components | Industrial Technology
Segment Reporting Information [Line Items]
Net revenues									92,427	89,229	97,938
Europe | Reportable Geographical Components | Energy Systems & Controls
Segment Reporting Information [Line Items]
Net revenues									119,434	119,032	129,021
Asia | Reportable Geographical Components
Segment Reporting Information [Line Items]
Net revenues									325,309	302,687	315,656
Asia | Reportable Geographical Components | RF Technology
Segment Reporting Information [Line Items]
Net revenues									10,180	11,988	10,019
Asia | Reportable Geographical Components | Medical & Scientific Imaging
Segment Reporting Information [Line Items]
Net revenues									119,150	111,843	112,732
Asia | Reportable Geographical Components | Industrial Technology
Segment Reporting Information [Line Items]
Net revenues									58,286	52,087	60,817
Asia | Reportable Geographical Components | Energy Systems & Controls
Segment Reporting Information [Line Items]
Net revenues									137,693	126,769	132,088
Middle East | Reportable Geographical Components
Segment Reporting Information [Line Items]
Net revenues									112,478	101,200	124,489
Middle East | Reportable Geographical Components | RF Technology
Segment Reporting Information [Line Items]
Net revenues									61,356	50,605	54,165
Middle East | Reportable Geographical Components | Medical & Scientific Imaging
Segment Reporting Information [Line Items]
Net revenues									11,051	10,107	15,877
Middle East | Reportable Geographical Components | Industrial Technology
Segment Reporting Information [Line Items]
Net revenues									4,833	2,997	4,220
Middle East | Reportable Geographical Components | Energy Systems & Controls
Segment Reporting Information [Line Items]
Net revenues									35,238	37,491	50,227
Rest of the world | Reportable Geographical Components
Segment Reporting Information [Line Items]
Net revenues									120,028	105,493	110,723
Rest of the world | Reportable Geographical Components | RF Technology
Segment Reporting Information [Line Items]
Net revenues									26,243	17,067	10,761
Rest of the world | Reportable Geographical Components | Medical & Scientific Imaging
Segment Reporting Information [Line Items]
Net revenues									22,708	21,549	20,417
Rest of the world | Reportable Geographical Components | Industrial Technology
Segment Reporting Information [Line Items]
Net revenues									21,485	20,675	24,471
Rest of the world | Reportable Geographical Components | Energy Systems & Controls
Segment Reporting Information [Line Items]
Net revenues									49,592	46,202	55,074
Non-U.S.
Segment Reporting Information [Line Items]
Net revenues									1,116,103	920,799	871,649
Non-U.S. | Reportable Geographical Components
Segment Reporting Information [Line Items]
Net revenues									1,341,162	1,174,979	1,162,058
Non-U.S. | Reportable Geographical Components | RF Technology
Segment Reporting Information [Line Items]
Net revenues									311,483	204,036	178,032
Non-U.S. | Reportable Geographical Components | Medical & Scientific Imaging
Segment Reporting Information [Line Items]
Net revenues									420,441	393,550	340,461
Non-U.S. | Reportable Geographical Components | Industrial Technology
Segment Reporting Information [Line Items]
Net revenues									241,110	225,539	253,272
Non-U.S. | Reportable Geographical Components | Energy Systems & Controls
Segment Reporting Information [Line Items]
Net revenues									$ 368,128	$ 351,854	$ 390,293