Operating Segments and Related Information (Details 5) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 471,248	$ 434,898	$ 1,397,982	$ 1,327,223
Industrial
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	176,617	177,151	544,889	536,231
Industrial | United States
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	94,676	95,896	295,008	271,451
Industrial | Europe [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	27,989	28,208	92,152	96,361
Industrial | Asia [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	40,133	37,881	118,026	121,593
Industrial | Mid_East/Africa [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	3,633	5,015	10,324	13,553
Industrial | Canada/Latin America
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	10,186	10,151	29,379	33,273
Government and Defense
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	213,348	171,955	584,207	492,313
Government and Defense | United States
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	146,421	114,176	389,940	312,106
Government and Defense | Europe [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	24,537	25,378	76,133	61,281
Government and Defense | Asia [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	16,080	14,326	51,014	46,373
Government and Defense | Mid_East/Africa [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	24,571	13,757	60,793	65,029
Government and Defense | Canada/Latin America
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	1,739	4,318	6,327	7,524
Commercial
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	81,283	85,792	268,886	298,679
Commercial | United States
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	28,819	30,463	96,566	115,957
Commercial | Europe [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	33,706	35,024	117,846	121,479
Commercial | Asia [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	10,603	10,343	27,724	28,646
Commercial | Mid_East/Africa [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	3,762	6,255	12,722	18,262
Commercial | Canada/Latin America
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	4,393	3,707	14,028	14,335
Total Segments [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	471,248	434,898	1,397,982	1,327,223
Total Segments [Member] | United States
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	269,916	240,535	781,514	699,514
Total Segments [Member] | Europe [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	86,232	88,610	286,131	279,121
Total Segments [Member] | Asia [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	66,816	62,550	196,764	196,612
Total Segments [Member] | Mid_East/Africa [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	31,966	25,027	83,839	96,844
Total Segments [Member] | Canada/Latin America
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 16,318	$ 18,176	$ 49,734	$ 55,132