Commitments And Contingencies (Asbestos Liability) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Asbestos Commitments And Contingencies [Member] Y Insurer_Group Claim customers quarter	Dec. 31, 2011 Asbestos Commitments And Contingencies [Member] customers	Dec. 31, 2010 Asbestos Commitments And Contingencies [Member] customers	Dec. 31, 2009 Asbestos Commitments And Contingencies [Member] customers	Dec. 31, 2012 Asbestos Commitments And Contingencies [Member] New York [Member] Claim	Dec. 31, 2012 Asbestos Commitments And Contingencies [Member] Mississippi [Member] Claim	Dec. 31, 2012 Asbestos Commitments And Contingencies [Member] Texas [Member] Claim	Dec. 31, 2012 Asbestos Commitments And Contingencies [Member] Ohio [Member] Claim	Jul. 14, 2008 Asbestos Commitments And Contingencies [Member] Joseph Norris [Member] Year	Jun. 30, 2009 Asbestos Commitments And Contingencies [Member] Earl Haupt [Member]	Feb. 23, 2011 Asbestos Commitments And Contingencies [Member] James Nelson [Member]	Mar. 23, 2010 Asbestos Commitments And Contingencies [Member] James Nelson [Member]	Feb. 23, 2011 Asbestos Commitments And Contingencies [Member] Larry Bell [Member]	Mar. 23, 2010 Asbestos Commitments And Contingencies [Member] Larry Bell [Member]	Aug. 21, 2012 Asbestos Commitments And Contingencies [Member] Ronald Dummitt [Member]	Aug. 17, 2011 Asbestos Commitments And Contingencies [Member] Ronald Dummitt [Member]	Mar. 14, 2008 Asbestos Commitments And Contingencies [Member] James Baccus [Member]	May 16, 2008 Asbestos Commitments And Contingencies [Member] Chief Brewer [Member]	Feb. 02, 2009 Asbestos Commitments And Contingencies [Member] Dennis Woodard [Member]	Mar. 09, 2012 Asbestos Commitments And Contingencies [Member] Frank Paasch [Member]	Aug. 29, 2012 Asbestos Commitments And Contingencies [Member] William Paulus [Member]	Oct. 23, 2012 Asbestos Commitments And Contingencies [Member] Gerald Suttner [Member]	Nov. 28, 2012 Asbestos Commitments And Contingencies [Member] James Hellam [Member]
Loss Contingencies [Line Items]
Pending claims				56,442	58,658	64,839	66,341	19,300	5,500	9,900	5,000
Number of judgments paid				2
Number of years after judgment paid												2
Jury verdict payment including accrued judgment interest												$ 2,540,000
Jury verdict payment													20,000
Compensatory damages																				2,450,000
Additional damages																				11,900,000
Jury verdict percentage of responsibility																			99.00%			0.50%
Share of responsibility of verdict															9.09%		5.00%						12.50%	10.00%	4.00%	7.00%
Jury Verdict Total																									120,000
Jury Verdict Non-Economic Damages																								6,500,000		4,500,000
Jury Verdict Economic Damages																								400,000		900,000
Jury verdict															14,500,000		3,500,000		32,000,000			16,930,000	123,000
Court judgment																200,000		4,900,000			680,000	1,650,000		800,000		1,282,000
Court judgment against all parties held responsible														4,000,000
Additional interest on the compensation awarded														10,000
Gross Settlement And Defense Incurred Costs				96,100,000	105,500,000	106,600,000
Number of coverage-in-place agreements with excess insurer groups				11
Number of buyout agreements with excess insurer groups				8
Pre-tax cash payments	77,957,000	79,277,000	66,731,000	78,000,000	79,300,000	66,700,000
Cumulative claims resolved				90,000
Settlement cost				370,000,000
Average settlement cost per resolved claim				6,300	4,123	7,036
Cumulative average settlement cost per resolved claim				4,000
Number of years included in methodology base reference period				2
Additional quarters included in methodology base reference period				3
Estimated payments to current and future claimants				36,000,000,000
Additional liability					285,000,000
Percentage of mesothelioma claims of total pending asbestos claims					8.00%
Percentage of mesothelioma claims of aggregate settlement and defense costs					90.00%
Liability for claims				796,000,000	894,000,000
Percentage Of Asbestos Liability Attributable To Settlement And Denfese Costs For Future Claims					80.00%
Current portion of total estimated liability	91,670,000	100,943,000		92,000,000
Insurance reimbursement asset				205,000,000	225,000,000
Forecasted liability reimbursement rate					25.00%
Aggregate value of policy buyout agreements				81,100,000
Court written decision																		8,000,000
Plaintiff's Request																									$ 3,000,000