SEGMENT INFORMATION (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Net sales		$ 578,314	$ 547,522
Operating income (expense)		72,045	64,498
Identifiable assets		3,328,802		$ 3,255,385
Commercial Industrial [Member]
Segment Reporting Information [Line Items]
Net sales		293,750	296,753
Operating income (expense)		39,446	39,225
Identifiable assets		1,455,070		1,398,601
Defense [Member]
Segment Reporting Information [Line Items]
Net sales		121,497	120,883
Operating income (expense)		17,653	19,728
Identifiable assets		1,036,152		961,298
Power [Member]
Segment Reporting Information [Line Items]
Net sales		164,147	132,158
Operating income (expense)		24,219	15,342
Identifiable assets		762,935		720,073
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Identifiable assets		74,645		$ 175,413
Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Operating income (expense)	[1]	(9,273)	(9,797)
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales		$ (1,080)	$ (2,272)

[1] Corporate and eliminations includes pension and other postretirement benefit expense, certain environmental costs related to remediation at legacy sites, foreign currency transactional gains and losses, and certain other expenses.