Schedule Of Acquisition Of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified			1 Months Ended							1 Months Ended					1 Months Ended			1 Months Ended		1 Months Ended						1 Months Ended						1 Months Ended			1 Months Ended
	Mar. 22, 2012 PSI Energy Solutions, LLC	Mar. 22, 2012 PSI Energy Solutions, LLC Customer Relationships	Mar. 22, 2012 PSI Energy Solutions, LLC Customer Relationships Minimum	Mar. 22, 2012 PSI Energy Solutions, LLC Customer Relationships Maximum	Mar. 22, 2012 PSI Energy Solutions, LLC Non-compete Agreements	Mar. 22, 2012 PSI Energy Solutions, LLC Other Intangible Assets	Dec. 29, 2011 Angus	Dec. 29, 2011 Angus Trade Names	Dec. 29, 2011 Angus Customer Relationships	Dec. 29, 2011 Angus Customer Relationships Minimum	Dec. 29, 2011 Angus Customer Relationships Maximum	Dec. 29, 2011 Angus Non-compete Agreements	Dec. 29, 2011 Angus Other Intangible Assets	Dec. 02, 2011 Coleman Cylinders	Dec. 02, 2011 Coleman Cylinders Customer Relationships	Dec. 02, 2011 Coleman Cylinders Non-compete Agreements	Sep. 30, 2011 STAKO	Sep. 30, 2011 STAKO Trade Names	Sep. 30, 2011 STAKO Customer Relationships	Sep. 30, 2011 STAKO Customer Relationships Minimum	Sep. 30, 2011 STAKO Customer Relationships Maximum	Sep. 30, 2011 STAKO Non-compete Agreements	Jul. 01, 2011 Bernz	Jul. 01, 2011 Bernz Trade Names	Jul. 01, 2011 Bernz Customer Relationships	Jul. 01, 2011 Bernz Customer Relationships Minimum	Jul. 01, 2011 Bernz Customer Relationships Maximum	Jul. 01, 2011 Bernz Non-compete Agreements	Dec. 28, 2010 Worthington Nitin Cylinders Limited	Dec. 28, 2010 Worthington Nitin Cylinders Limited Trade Names	Dec. 28, 2010 Worthington Nitin Cylinders Limited Customer Relationships	Dec. 28, 2010 Worthington Nitin Cylinders Limited Customer Relationships Minimum	Dec. 28, 2010 Worthington Nitin Cylinders Limited Customer Relationships Maximum	Dec. 28, 2010 Worthington Nitin Cylinders Limited Other Intangible Assets	Dec. 28, 2010 Worthington Nitin Cylinders Limited Other Intangible Assets Minimum	Dec. 28, 2010 Worthington Nitin Cylinders Limited Other Intangible Assets Maximum
Business Acquisition [Line Items]
Acquired indefinite lived intangible assets								$ 19,100										$ 1,500						$ 8,481						$ 850
Acquired finite lived intangible assets	3,390	1,540			180	1,670			32,200			640	963	4,560	4,400	160			2,500			400			10,473			2,268			160			230
Useful life (Years)			15 years	20 years	3 years	10 years				10 years	15 years	3 years	9 years		15 years	5 years		10 years		10 years	15 years	3 years				9 years	13 years	5 years				15 years	20 years		1 year	10 years
Total acquired identifiable intangible assets							$ 52,903										$ 4,400						$ 21,222						$ 1,240