Operating Segments and Related Information (Details 5) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 482,015	$ 481,998	$ 932,938	$ 926,734
Industrial Technologies
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	300,198	284,489	576,613	555,875
Industrial Technologies | United States
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	131,301	134,656	234,638	268,079
Industrial Technologies | Europe [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	77,831	74,439	143,166	148,303
Industrial Technologies | Asia [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	60,951	53,622	134,338	95,014
Industrial Technologies | Mid_East/Africa [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	14,788	5,786	32,815	15,651
Industrial Technologies | Canada/Latin America
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	15,327	15,986	31,656	28,828
Defense Technologies
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	181,817	197,509	356,325	370,859
Defense Technologies | United States
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	111,700	134,216	227,647	243,519
Defense Technologies | Europe [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	25,945	25,000	45,421	51,596
Defense Technologies | Asia [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	16,214	17,548	28,078	34,934
Defense Technologies | Mid_East/Africa [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	25,094	18,815	50,222	36,222
Defense Technologies | Canada/Latin America
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	2,864	1,930	4,957	4,588
Total Segments [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	482,015	481,998	932,938	926,734
Total Segments [Member] | United States
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	243,001	268,872	462,285	511,598
Total Segments [Member] | Europe [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	103,776	99,439	188,587	199,899
Total Segments [Member] | Asia [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	77,165	71,170	162,416	129,948
Total Segments [Member] | Mid_East/Africa [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	39,882	24,601	83,037	51,873
Total Segments [Member] | Canada/Latin America
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 18,191	$ 17,916	$ 36,613	$ 33,416