Commitments and Contingencies (Details) (USD $)	3 Months Ended		6 Months Ended			154 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Asbestos [Member] Claim	Jun. 30, 2014 Asbestos [Member] Claim	Jun. 30, 2014 Asbestos [Member] Minimum [Member]	Jun. 30, 2014 Asbestos [Member] Maximum [Member]
Loss Contingencies [Line Items]
Pending claims, approximate number					2,180	2,180
Reimbursement from insurance carrier for settled claims						$ 16,200,000
Estimated legal costs							24,400,000	37,400,000
Decrease for low end of range					2,700,000
Decrease for high end of range					4,100,000
Range of possible loss, minimum					27,400,000	27,400,000
Range of possible loss, maximum					48,100,000	48,100,000
Litigation charge	10,650,000	0	10,650,000	0
Changes in product warranties [Roll forward]
Balance, beginning of period	20,374,000	19,414,000	18,041,000	17,288,000
Liabilities accrued for current year sales	22,425,000	22,020,000	41,616,000	40,376,000
Settlements of warranty claims	(19,998,000)	(17,936,000)	36,856,000	34,166,000
Balance, end of period	$ 22,801,000	$ 23,498,000	$ 22,801,000	$ 23,498,000