Operating Segments and Related Information (Details 5) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 466,414	$ 471,248	$ 1,399,352	$ 1,397,982
Industrial Technologies
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	281,119	257,900	857,732	813,775
Industrial Technologies | United States
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	127,594	123,495	362,232	391,574
Industrial Technologies | Europe [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	73,031	61,695	216,197	209,998
Industrial Technologies | Asia [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	53,991	50,736	188,329	145,750
Industrial Technologies | Mid_East/Africa [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	9,072	7,395	41,887	23,046
Industrial Technologies | Canada/Latin America
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	17,431	14,579	49,087	43,407
Defense Technologies
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	185,295	213,348	541,620	584,207
Defense Technologies | United States
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	134,518	146,421	362,165	389,940
Defense Technologies | Europe [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	24,312	24,537	69,733	76,133
Defense Technologies | Asia [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	11,214	16,080	39,292	51,014
Defense Technologies | Mid_East/Africa [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	10,135	24,571	60,357	60,793
Defense Technologies | Canada/Latin America
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	5,116	1,739	10,073	6,327
Total Segments [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	466,414	471,248	1,399,352	1,397,982
Total Segments [Member] | United States
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	262,112	269,916	724,397	781,514
Total Segments [Member] | Europe [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	97,343	86,232	285,930	286,131
Total Segments [Member] | Asia [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	65,205	66,816	227,621	196,764
Total Segments [Member] | Mid_East/Africa [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	19,207	31,966	102,244	83,839
Total Segments [Member] | Canada/Latin America
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 22,547	$ 16,318	$ 59,160	$ 49,734