Description of the Business and Summary of Significant Accounting Policies (Details 3) (USD $)	3 Months Ended	12 Months Ended
	Sep. 30, 2012 item	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Intangible Assets
Gross assets		$ 632,120,000	$ 632,120,000
Accumulated amortization		215,485,000	181,227,000
Net assets		416,635,000	450,893,000
Amortization expense		34,300,000	38,300,000	44,300,000
Estimated amortization expense
2013		30,476,000
2014		26,090,000
2015		23,390,000
2016		20,902,000
2017		18,193,000
Thereafter		107,784,000
Total		226,835,000
Impairment of Long-Lived Tangible and Finite-Lived Intangible Assets
Number of small joint ventures terminated	2
Impairment charges	8,300,000	8,250,000		12,805,000
Weighted average
Intangible Assets
Weighted Average Amortization Period		19 years
Trademarks
Intangible Assets
Gross assets		189,800,000	189,800,000
Customer and scrap generator relationships
Intangible Assets
Gross assets		408,400,000	408,400,000
Customer and scrap generator relationships | Minimum
Intangible Assets
Weighted Average Amortization Period		10 years
Customer and scrap generator relationships | Maximum
Intangible Assets
Weighted Average Amortization Period		25 years
Customer and scrap generator relationships | Weighted average
Intangible Assets
Weighted Average Amortization Period		20 years
Trademarks
Intangible Assets
Gross assets		19,700,000	19,700,000
Trademarks | Minimum
Intangible Assets
Weighted Average Amortization Period		4 years
Trademarks | Maximum
Intangible Assets
Weighted Average Amortization Period		12 years
Trademarks | Weighted average
Intangible Assets
Weighted Average Amortization Period		12 years
Other
Intangible Assets
Gross assets		$ 14,220,000	$ 14,220,000
Other | Minimum
Intangible Assets
Weighted Average Amortization Period		3 months
Other | Maximum
Intangible Assets
Weighted Average Amortization Period		6 years
Other | Weighted average
Intangible Assets
Weighted Average Amortization Period		5 years