DISCONTINUED OPERATIONS (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Income Statement Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain (loss) on divestiture	$ (144)	$ 0	$ 18,172	$ 0
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	(144)	2,619	21,231	5,885
Heat Treating [Member]
Income Statement Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Revenue	0	9,225	10,785	27,377
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	0	4,221	4,929	9,484
Discontinued Operation, Tax Effect of Discontinued Operation	0	(1,602)	(1,870)	(3,599)
Gain (loss) on divestiture	(144)	0	18,172	0
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	(144)	2,619	21,231	5,885
Discontinued Operation, Tax Effect of Income (Loss) from Disposal of Discontinued Operation			$ 11,026