Commitments And Contingencies (Asbestos Liability) (Detail) (USD $)	9 Months Ended			3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Asbestos Commitments and Contingencies Claim Insurer_Group	Sep. 30, 2013 Asbestos Commitments and Contingencies	Sep. 30, 2014 Asbestos Commitments and Contingencies Claim Insurer_Group	Sep. 30, 2013 Asbestos Commitments and Contingencies Claim	Dec. 31, 2013 Asbestos Commitments and Contingencies Claim	Dec. 31, 2012 Asbestos Commitments and Contingencies Claim	Dec. 31, 2011 Asbestos Commitments and Contingencies	Jun. 30, 2014 Asbestos Commitments and Contingencies	Jun. 30, 2013 Asbestos Commitments and Contingencies	Mar. 09, 2012 Frank Paasch Asbestos Commitments and Contingencies	Jul. 14, 2008 Joseph Norris Asbestos Commitments and Contingencies Year	Jun. 30, 2014 Earl Haupt Asbestos Commitments and Contingencies Year	Jun. 30, 2009 Earl Haupt Asbestos Commitments and Contingencies	Feb. 23, 2011 James Nelson Asbestos Commitments and Contingencies	Mar. 23, 2010 James Nelson Asbestos Commitments and Contingencies	Feb. 23, 2011 Larry Bell Asbestos Commitments and Contingencies	Mar. 23, 2010 Larry Bell Asbestos Commitments and Contingencies	Aug. 17, 2011 Ronald Dummitt Asbestos Commitments and Contingencies	Feb. 25, 2013 Frank Paasch Asbestos Commitments and Contingencies	Jun. 30, 2014 William Paulus [Member] Asbestos Commitments and Contingencies	Aug. 29, 2012 William Paulus [Member] Asbestos Commitments and Contingencies	Feb. 25, 2013 Frank Vincinguerra Asbestos Commitments and Contingencies	Oct. 23, 2012 Gerald Suttner Asbestos Commitments and Contingencies	Nov. 28, 2012 James Hellam Asbestos Commitments and Contingencies	Mar. 01, 2013 Ivo Peraica Asbestos Commitments and Contingencies	Jul. 31, 2013 Holdsworth [Member] Asbestos Commitments and Contingencies	Sep. 11, 2013 Lloyd Garvin [Member] Asbestos Commitments and Contingencies	Sep. 17, 2013 Richard DeLisle [Member] Asbestos Commitments and Contingencies	Jun. 16, 2014 Ivan Sweberg [Member] Asbestos Commitments and Contingencies	Jun. 16, 2014 Selwyn Hackshaw [Member] Asbestos Commitments and Contingencies	Sep. 30, 2014 New York Asbestos Commitments and Contingencies LegalMatter	Sep. 30, 2014 Mississippi Asbestos Commitments and Contingencies LegalMatter	Sep. 30, 2014 Texas Asbestos Commitments and Contingencies LegalMatter	Sep. 30, 2014 Ohio Asbestos Commitments and Contingencies LegalMatter	Dec. 30, 2009 Maritime Claims [Member] Asbestos Commitments and Contingencies Claim
Loss Contingencies [Line Items]
Total number of maritime claims																																						36,448
Plaintiff's Request																													$ 1,100,000
Compensatory Damages																														11,000,000
Court written decision																					8,000,000
Pending claims				47,922	53,822	47,922	53,822	51,490	56,442		49,770	54,969																						18,700	5,100	9,600	300
Number of judgments paid				3		3
Number of years after judgment paid, years														2	2
Jury verdict payment including accrued judgment interest														2,540,000
Jury Verdict Payment																20,000							900,000
Additional damages																														11,000,000
Court judgment																			200,000		4,900,000			800,000		100,000	1,282,000	10,600,000			1,300,000
CourtJudgmentIncludingSetoffs																											1,100,000
Jury verdict percentage of responsibility.																					99.00%
Jury verdict													123,000					14,500,000		3,500,000	32,000,000	2,500,000			2,300,000						8,000,000
Jury Verdict Total																												35,000,000	3,100,000			15,000,000	10,000,000
Court_Reduced_Verdict																												18,000,000
Share Of Responsibility Of Verdict													12.50%					9.09%		5.00%		10.00%		10.00%	20.00%	4.00%	7.00%				16.00%
Plaintiff's Damages																										3,000,000
Court judgment against all parties held responsible																	4,000,000
Additional interest on the compensation awarded																	10,000
Payments for asbestos-related fees and costs, net of insurance recoveries	46,193,000	48,314,000		15,400,000	19,400,000	46,200,000	48,300,000	62,800,000
Cumulative claims resolved				106,000		106,000
Settlement cost				418,000,000		418,000,000
Average settlement cost per resolved claim								3,300	6,300	4,123
Cumulative average settlement cost per resolved claim				4,000		4,000
Number of years included in methodology base reference period				2		2
Additional quarters included in methodology base reference period				3		3
Estimated payments to current and future claimants				36,000,000,000		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				637,000,000		637,000,000				894,000,000
Percentage Of Asbestos Liability Attributable To Settlement And Denfese Costs For Future Claims										80.00%
Current portion of total estimated liability	88,038,000		88,038,000	88,000,000		88,000,000
Number of coverage in place agreements with excess insurer groups				11		11
Number of buyout agreements with excess insurer groups				10		10
Aggregate value of policy buyout agreements				82,500,000		82,500,000
Forecasted percentage of liability that would be reimbursed by insurers										25.00%
Insurance reimbursement asset				155,000,000		155,000,000				225,000,000
Jury Verdict Non-Economic Damages																								6,500,000			4,500,000
Jury Verdict Economic Damages																								400,000			900,000
Gross Settlement And Defense Incurred Costs				$ 16,500,000	$ 24,800,000	$ 61,400,000	$ 67,900,000	$ 90,800,000