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Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Summarized financial information of the reportable segments
Sales	$ 866,118	$ 924,301	$ 2,621,604	$ 2,742,826
Segment operating income	57,362	87,322	185,628	154,977
Operating Segments
Summarized financial information of the reportable segments
Sales	866,118	924,301	2,621,604	2,742,826
Intersegment sales	1,845	1,128	3,674	3,990
Segment operating income	86,814	117,412	270,383	260,900
Intersegment sales
Summarized financial information of the reportable segments
Intersegment sales	(1,845)	(1,128)	(3,674)	(3,990)
Segment operating income	(29,452)	(30,090)	(84,755)	(105,923)
FPD
Summarized financial information of the reportable segments
Sales	601,108	669,535	1,820,708	1,978,215
FPD | Operating Segments
Summarized financial information of the reportable segments
Sales	601,108	669,535	1,820,708	1,978,215
Intersegment sales	731	673	1,463	1,710
Segment operating income	59,071	86,660	180,698	186,740
FCD
Summarized financial information of the reportable segments
Sales	265,010	254,766	800,896	764,611
FCD | Operating Segments
Summarized financial information of the reportable segments
Sales	265,010	254,766	800,896	764,611
Intersegment sales	1,114	455	2,211	2,280
Segment operating income	$ 27,743	$ 30,752	$ 89,685	$ 74,160

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