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Commitments and Contingencies (Details) $ in Thousands	3 Months Ended		6 Months Ended		202 Months Ended
	Jun. 30, 2018 USD ($) Claim	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) Claim	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) Claim
Changes in product warranties [Roll forward]
Balance, beginning of period	$ 20,560	$ 25,609	$ 20,929	$ 24,072
Liabilities accrued for current year sales	23,136	25,693	44,378	51,423
Settlements of warranty claims	(21,991)	(26,774)	(43,602)	(50,967)
Balance, end of period	$ 21,705	$ 24,528	$ 21,705	$ 24,528	$ 21,705
Asbestos [Member]
Contingencies [Abstract]
Pending claims, approximate number | Claim	1,550		1,550		1,550
Payment for settled claims					$ 24,800
Increase from low end of range			$ 4,200
Increase from high end of range			6,300
Asbestos [Member] | Minimum [Member]
Contingencies [Abstract]
Range of possible loss	$ 35,200		35,200		35,200
Asbestos [Member] | Maximum [Member]
Contingencies [Abstract]
Range of possible loss	54,000		54,000		54,000
Asbestos [Member] | Discontinued Operations [Member]
Contingencies [Abstract]
Incremental pre-tax provision			6,000
Asbestos [Member] | Discontinued Operations [Member] | Minimum [Member]
Contingencies [Abstract]
Range of possible loss	44,300		44,300		44,300
Asbestos [Member] | Discontinued Operations [Member] | Maximum [Member]
Contingencies [Abstract]
Range of possible loss	$ 79,600		$ 79,600		$ 79,600

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