SEGMENT INFORMATION (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net sales	$ 621,495	$ 550,047	$ 1,218,554	$ 1,151,278
Operating income (expense)	94,583	55,349	179,649	127,795
Identifiable assets	4,084,985		4,084,985		$ 4,021,334
Aerospace & Industrial [Member]
Segment Reporting Information [Line Items]
Net sales	200,254	177,612	381,392	404,633
Operating income (expense)	31,977	9,615	51,002	41,755
Identifiable assets	1,022,568		1,022,568		1,020,294
Defense Electronics [Member]
Segment Reporting Information [Line Items]
Net sales	163,468	139,927	345,766	280,238
Operating income (expense)	29,271	24,736	65,894	48,799
Identifiable assets	1,551,428		1,551,428		1,542,686
Naval & Power [Member]
Segment Reporting Information [Line Items]
Net sales	259,496	233,035	495,076	468,049
Operating income (expense)	43,095	29,146	81,152	57,256
Identifiable assets	1,285,349		1,285,349		1,255,325
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Operating income (expense)	(9,760)	(8,148)	(18,399)	(20,015)
Identifiable assets	195,953		195,953		175,445
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	(1,723)	$ (527)	(3,680)	$ (1,642)
Operating Segments | Assets Held for Sale
Segment Reporting Information [Line Items]
Identifiable assets	$ 29,687		$ 29,687		$ 27,584