Operating Segments and Related Information (Details 4) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 524,337	$ 466,414	$ 482,015	$ 450,923	$ 489,044	$ 471,248	$ 481,998	$ 444,736	$ 1,923,689	$ 1,887,026	$ 1,775,686
United States
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									1,029,247
Europe [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									393,164
Asia [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									292,898
Mid_East/Africa [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									141,015
Canada/Latin_America [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									67,365
Total Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue										1,887,026
Total Segments [Member] | United States
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue										1,037,194
Total Segments [Member] | Europe [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue										398,485
Total Segments [Member] | Asia [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue										257,154
Total Segments [Member] | Mid_East/Africa [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue										122,752
Total Segments [Member] | Canada/Latin_America [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue										71,441
Industrial
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									1,156,058	1,092,085	1,112,250
Industrial | United States
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									517,951	523,766
Industrial | Europe [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									294,090	280,184
Industrial | Asia [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									238,997	193,437
Industrial | Mid_East/Africa [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									48,772	32,642
Industrial | Canada/Latin_America [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									56,248	62,056
Government and defense
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									767,631	794,941	$ 663,436
Government and defense | United States
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									511,296	513,428
Government and defense | Europe [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									99,074	118,301
Government and defense | Asia [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									53,901	63,717
Government and defense | Mid_East/Africa [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									92,243	90,110
Government and defense | Canada/Latin_America [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									$ 11,117	$ 9,385