REVENUE DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Sales	$ 621,495	$ 550,047	$ 1,218,554	$ 1,151,278
Defense [Member]
Disaggregation of Revenue [Line Items]
Sales	397,477	365,359	799,413	756,217
Commercial [Member]
Disaggregation of Revenue [Line Items]
Sales	224,018	184,688	419,141	395,061
Aerospace Defense [Member] | Defense [Member]
Disaggregation of Revenue [Line Items]
Sales	99,977	109,305	210,993	211,133
Ground Defense [Member] | Defense [Member]
Disaggregation of Revenue [Line Items]
Sales	48,221	20,029	103,967	42,686
Naval Defense [Member] | Defense [Member]
Disaggregation of Revenue [Line Items]
Sales	177,724	164,941	355,629	330,633
Commercial Aerospace [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Sales	71,555	71,084	128,824	171,765
Power & Process [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Sales	125,333	112,787	230,837	236,713
General Industrial [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Sales	$ 98,685	$ 71,901	$ 188,304	$ 158,348
Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Net Sales, Net, Percent	52.00%	54.00%	52.00%	53.00%
Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Net Sales, Net, Percent	48.00%	46.00%	48.00%	47.00%