Operating Segments and Related Information (Details 5) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 481,998	$ 452,707	$ 926,734	$ 892,325
Industrial
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	188,902	188,421	368,272	359,079
Industrial | United States
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	99,122	89,259	200,332	175,555
Industrial | Europe [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	32,855	32,610	64,163	68,153
Industrial | Asia [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	43,459	49,655	77,893	83,711
Industrial | Mid_East/Africa [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	2,922	4,873	6,691	8,538
Industrial | Canada/Latin America
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	10,544	12,024	19,193	23,122
Government and Defense
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	197,509	161,027	370,859	320,358
Government and Defense | United States
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	134,216	102,798	243,519	197,931
Government and Defense | Europe [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	25,000	18,701	51,596	35,903
Government and Defense | Asia [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	17,548	13,696	34,934	32,049
Government and Defense | Mid_East/Africa [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	18,815	24,088	36,222	51,270
Government and Defense | Canada/Latin America
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	1,930	1,744	4,588	3,205
Commercial
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	95,587	103,259	187,603	212,888
Commercial | United States
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	35,534	41,478	67,747	85,493
Commercial | Europe [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	41,584	41,678	84,140	86,455
Commercial | Asia [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	10,163	9,339	17,121	18,303
Commercial | Mid_East/Africa [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	2,864	6,448	8,960	12,008
Commercial | Canada/Latin America
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	5,442	4,316	9,635	10,629
Total Segments [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	481,998	452,707	926,734	892,325
Total Segments [Member] | United States
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	268,872	233,535	511,598	458,979
Total Segments [Member] | Europe [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	99,439	92,989	199,899	190,511
Total Segments [Member] | Asia [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	71,170	72,690	129,948	134,063
Total Segments [Member] | Mid_East/Africa [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	24,601	35,409	51,873	71,816
Total Segments [Member] | Canada/Latin America
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 17,916	$ 18,084	$ 33,416	$ 36,956