SEGMENT INFORMATION (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Net sales	$ 565,566	$ 507,092	$ 532,766	$ 503,507	$ 588,755	$ 525,535	$ 545,194	$ 546,199	$ 2,108,931	$ 2,205,683	$ 2,243,126
Operating income									308,098	310,617	282,373
Depreciation and amortization									96,008	100,810	118,931
Total assets	3,037,781				2,989,611				3,037,781	2,989,611	3,382,448
Capital expenditures related to discontinued operations										200	4,900
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Operating income									(23,215)	(34,790)	(30,312)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales									2,108,931	2,205,683	2,243,126
Operating income									308,098	310,617	282,373
Depreciation and amortization									96,008	99,475	104,925
Total assets	3,037,781				2,989,611				3,037,781	2,989,611	3,382,448
PropertyPlantAndEquipmentAdditions									46,776	35,512	67,115
Operating Segments [Member] | Commercial/Industrial
Segment Reporting Information [Line Items]
Segment Reporting Information, Revenue for Reportable Segment									1,120,326	1,189,120	1,232,696
Operating income									156,550	171,525	178,684
Depreciation and amortization									53,970	55,799	58,276
Total assets	1,391,040				1,480,052				1,391,040	1,480,052	1,543,795
PropertyPlantAndEquipmentAdditions									30,145	21,990	37,329
Operating Segments [Member] | Defense
Segment Reporting Information [Line Items]
Segment Reporting Information, Revenue for Reportable Segment									469,796	479,528	492,094
Operating income									98,291	98,895	82,552
Depreciation and amortization									14,488	15,965	19,530
Total assets	751,859				800,613				751,859	800,613	845,193
PropertyPlantAndEquipmentAdditions									5,870	3,834	5,175
Operating Segments [Member] | Power
Segment Reporting Information [Line Items]
Segment Reporting Information, Revenue for Reportable Segment									524,967	545,013	527,034
Operating income									76,472	74,987	51,449
Depreciation and amortization									23,032	23,419	23,060
Total assets	516,321				629,612				516,321	629,612	579,736
PropertyPlantAndEquipmentAdditions									6,653	6,163	16,057
Operating Segments [Member] | Corporate And Other [Member]
Segment Reporting Information [Line Items]
Operating income									(23,215)	(34,790)	(30,312)
Depreciation and amortization									4,518	4,292	4,059
Total assets	$ 378,561				$ 79,334				378,561	79,334	266,377
PropertyPlantAndEquipmentAdditions									4,108	3,525	8,554
Operating Segments [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information, Revenue for Reportable Segment									$ (6,158)	$ (7,978)	(8,698)
Operating Segments [Member] | Held-for-sale [Member]
Segment Reporting Information [Line Items]
Total assets											$ 147,347