REVENUE DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Sales	$ 620,619	$ 571,614	$ 1,839,173	$ 1,722,892
Commercial [Member]
Disaggregation of Revenue [Line Items]
Sales	205,381	192,641	624,522	587,702
Total Aerospace & Defense
Disaggregation of Revenue [Line Items]
Sales	415,238	378,973	1,214,651	1,135,190
Aerospace Defense [Member] | Defense [Member]
Disaggregation of Revenue [Line Items]
Sales	116,853	121,987	327,846	333,120
Ground Defense [Member] | Defense [Member]
Disaggregation of Revenue [Line Items]
Sales	55,124	20,519	159,091	63,205
Naval Defense [Member] | Defense [Member]
Disaggregation of Revenue [Line Items]
Sales	175,800	165,524	531,429	496,157
Commercial Aerospace [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Sales	67,461	70,943	196,285	242,708
Power & Process [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Sales	112,736	113,919	343,573	350,632
General Industrial [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Sales	$ 92,645	$ 78,722	$ 280,949	$ 237,070
Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Net Sales, Net, Percent	48.00%	50.00%	51.00%	52.00%
Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Net Sales, Net, Percent	52.00%	50.00%	49.00%	48.00%