1. Basis of Presentation and Use of Estimates Immaterial Error Corrections (Details) (USD $)	3 Months Ended
Mar. 31, 2012
Cost of goods sold, immaterial error [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Quantifying Misstatement in Current Year Financial Statements, Amount	$ 4,100,000
Interest expense, immaterial error [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Quantifying Misstatement in Current Year Financial Statements, Amount	1,200,000
Other (income) expense, net, immaterial error [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Quantifying Misstatement in Current Year Financial Statements, Amount	800,000
Income tax benefit, immaterial error [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Quantifying Misstatement in Current Year Financial Statements, Amount	(700,000)
2007 through 2011 [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Quantifying Misstatement Amount	6,100,000
First quarter of 2011 [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Quantifying Misstatement Amount	(1,600,000)
2008 through 2011 [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Quantifying Misstatement Amount	900,000
2007 [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Quantifying Misstatement Amount	1,100,000
2008 [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Quantifying Misstatement Amount	1,500,000
2009 [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Quantifying Misstatement Amount	1,300,000
2010 [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Quantifying Misstatement Amount	1,600,000
2011 [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Quantifying Misstatement Amount	$ (100,000)

1. Basis of Presentation and Use of Estimates Immaterial Error Corrections (Details) (USD $)

3 Months Ended

Mar. 31, 2012

Cost of goods sold, immaterial error [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Quantifying Misstatement in Current Year Financial Statements, Amount

$ 4,100,000

Interest expense, immaterial error [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Quantifying Misstatement in Current Year Financial Statements, Amount

1,200,000

Other (income) expense, net, immaterial error [Member]