Nature Of Operations And Summary Of Significant Accounting Policies (Narrative) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 years	Dec. 31, 2010	Dec. 31, 2009
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Other intangible assets amortized period, minimum, years	6
Other intangible assets amortized period, maximum, years	20
Minimum percentage chance of tax benefit realization in final settlement	50.00%
Prior service costs from plan improvements amortization period, minimum, years	10
Prior service costs from plan improvements amortization period, maximum, years	20
Amortization period of internal and external development costs, years	7
Stock options and stock settled appreciation rights (SSARs) excluded from calculation of diluted shares	78,000	0	283,000
Net income	$ 266,866	$ 263,557	$ 195,526
Difference amount between basic and diluted net income per share	$ 0.01	$ 0.01	$ 0.01
Percentage of total common shares outstanding	0.60%	0.60%	0.60%
Changes in other liabilities	(14,668)	2,299	4,804
Buildings And Improvements [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Minimum useful life of property, plant and equipment, years	10
Maximum useful life of property, plant and equipment, years	40
Machinery And Equipment [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Minimum useful life of property, plant and equipment, years	3
Maximum useful life of property, plant and equipment, years	10
Information Technology Hardware And Software [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Minimum useful life of property, plant and equipment, years	3
Maximum useful life of property, plant and equipment, years	7
Reclassified From Changes In Other Assets [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Changes in other liabilities		4,100	24,400
Reclassified From Stock-Based Compensation [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Changes in other liabilities		3,600	2,200
PRS [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Net income	$ 1,700	$ 1,700	$ 1,300