Operating Segments and Related Information (Details 4) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 489,044	$ 471,248	$ 481,998	$ 444,736	$ 448,463	$ 434,898	$ 452,707	$ 439,618	$ 1,887,026	$ 1,775,686	$ 1,800,434
United States
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									1,037,194
Europe [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									398,485
Asia [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									257,154
Mid_East/Africa [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									122,752
Canada/Latin_America [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									71,441
Total Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue										1,775,686
Total Segments [Member] | United States
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue										934,527
Total Segments [Member] | Europe [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue										376,853
Total Segments [Member] | Asia [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue										255,160
Total Segments [Member] | Mid_East/Africa [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue										131,055
Total Segments [Member] | Canada/Latin_America [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue										78,091
Industrial
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									737,656	717,882	672,120
Industrial | United States
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									392,510	364,443
Industrial | Europe [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									130,060	130,901
Industrial | Asia [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									157,819	159,150
Industrial | Mid_East/Africa [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									14,799	18,089
Industrial | Canada/Latin_America [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									42,468	45,299
Government and defense
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									794,941	663,436	629,147
Government and defense | United States
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									513,428	420,032
Government and defense | Europe [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									118,301	89,725
Government and defense | Asia [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									63,717	55,160
Government and defense | Mid_East/Africa [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									90,110	85,726
Government and defense | Canada/Latin_America [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									9,385	12,793
Commercial
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									354,429	394,368	$ 499,167
Commercial | United States
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									131,256	150,052
Commercial | Europe [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									150,124	156,227
Commercial | Asia [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									35,618	40,850
Commercial | Mid_East/Africa [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									17,843	27,240
Commercial | Canada/Latin_America [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									$ 19,588	$ 19,999