Commitments and Contingencies (Details) $ in Thousands	3 Months Ended		6 Months Ended		166 Months Ended
	Jun. 30, 2015 USD ($) Claim	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Claim	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Claim
Loss Contingencies [Line Items]
Payment for settled claims	$ 0	$ 10,650	$ 0	$ 10,650
Changes in product warranties [Roll forward]
Balance, beginning of period	19,985	20,374	19,328	18,041
Liabilities accrued for current year sales	25,951	22,425	46,987	41,616
Settlements of warranty claims	(20,788)	(19,998)	(41,167)	(36,856)
Balance, end of period	$ 25,148	$ 22,801	$ 25,148	$ 22,801	$ 25,148
Asbestos [Member]
Loss Contingencies [Line Items]
Pending claims, approximate number | Claim	2,170		2,170		2,170
Payment for settled claims					$ 17,800
Increase for low end of range			$ 11,700
Increase for high end of range			18,000
Incremental pre-tax provision			12,800
Range of possible loss, minimum	$ 43,000		43,000		43,000
Range of possible loss, maximum	76,400		76,400		76,400
Asbestos [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Estimated legal costs	36,100		36,100		36,100
Asbestos [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Estimated legal costs	$ 55,400		$ 55,400		$ 55,400