SEGMENT INFORMATION (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net sales	$ 550,047	$ 638,996	$ 1,151,278	$ 1,217,310
Operating income (expense)	55,349	105,685	127,795	177,730
Identifiable assets	3,642,671		3,642,671		$ 3,764,261
Commercial Industrial [Member]
Segment Reporting Information [Line Items]
Net sales	213,814	293,149	478,314	563,309
Operating income (expense)	14,366	51,376	49,353	86,581
Identifiable assets	1,385,177		1,385,177		1,363,592
Defense [Member]
Segment Reporting Information [Line Items]
Net sales	170,025	158,629	336,176	292,538
Operating income (expense)	27,872	32,607	56,576	53,339
Identifiable assets	1,198,054		1,198,054		1,209,706
Power [Member]
Segment Reporting Information [Line Items]
Net sales	166,684	188,419	337,688	363,454
Operating income (expense)	21,259	31,983	41,881	57,364
Identifiable assets	885,353		885,353		885,727
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Operating income (expense)	(8,148)	(10,281)	(20,015)	(19,554)
Identifiable assets	174,087		174,087		$ 305,236
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	$ (476)	$ (1,201)	$ (900)	$ (1,991)