Commitments and Contingencies (Details) $ in Thousands	3 Months Ended		9 Months Ended		169 Months Ended
	Sep. 30, 2015 USD ($) Claim	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) Claim	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) Claim
Loss Contingencies [Line Items]
Payment for settled claims	$ 0	$ 0	$ 0	$ 10,650
Changes in product warranties [Roll forward]
Balance, beginning of period	25,148	22,801	19,328	18,041
Liabilities accrued for current year sales	25,626	21,490	72,613	63,106
Settlements of warranty claims	(24,919)	(22,457)	(66,086)	(59,313)
Balance, end of period	$ 25,855	$ 21,834	$ 25,855	$ 21,834	$ 25,855
Asbestos [Member]
Loss Contingencies [Line Items]
Pending claims, approximate number | Claim	2,190		2,190		2,190
Payment for settled claims					$ 18,600
Decrease for low end of range			$ 2,800
Decrease for high end of range			4,300
Range of possible loss, minimum	$ 33,300		33,300		33,300
Range of possible loss, maximum	51,100		51,100		51,100
Asbestos [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Estimated legal costs	40,000		40,000		40,000
Asbestos [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Estimated legal costs	$ 75,500		$ 75,500		$ 75,500