DISCONTINUED OPERATIONS (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Income Statement Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain (loss) on divestiture	$ (95)	$ 0	$ 18,316	$ 0
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	(95)	1,717	21,375	3,266
Heat Treating [Member]
Income Statement Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Revenue	0	9,233	10,785	18,152
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	0	2,767	4,929	5,263
Discontinued Operation, Tax Effect of Discontinued Operation	0	(1,050)	(1,870)	(1,997)
Gain (loss) on divestiture	(95)	0	18,316	0
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	(95)	1,717	21,375	3,266
Discontinued Operation, Tax Effect of Income (Loss) from Disposal of Discontinued Operation			$ 11,114