ACQUISITIONS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		1 Months Ended	12 Months Ended		12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Jun. 30, 2011 Techalloy	Jul. 29, 2011 Techalloy	Jun. 30, 2011 Torchmate	Jul. 29, 2011 Torchmate	Dec. 31, 2010 OOO Severstal-metiz	Mar. 11, 2011 OOO Severstal-metiz	Jan. 31, 2011 SSCO Manufacturing, Inc. (d/b/a Arc Products) year	Dec. 31, 2010 SSCO Manufacturing, Inc. (d/b/a Arc Products)	Sep. 30, 2011 SSCO Manufacturing, Inc. (d/b/a Arc Products)	Oct. 31, 2010 Mezhgosmetiz-Mtsensk OAO	Oct. 29, 2010 Mezhgosmetiz-Mtsensk OAO
Acquisitions
Consideration paid in cash and assumed debt										$ 16,861					$ 28,500
Preliminary fair value of assets acquired						33,514		2,400		8,322	3,613
Goodwill from acquisition						4,368		5,709		8,539	3,473
Annual sales at the date of acquisition	701,624	519,338	2,000,096	1,505,880	70,000		13,000
Consideration paid in cash						37,882		8,109			3,280
Sales for last annual period									40,000					30,000
Fair value of contingent consideration liability											$ 3,806		$ 4,153
Period of estimated sales as basis for contingent consideration (in years)											5
Sales for prior annual period												Not Significant