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Revenue Recognition (Disaggregation of revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Sales	$ 898,178	$ 925,012	$ 1,755,486	$ 1,818,526
Original Equipment
Disaggregation of Revenue [Line Items]
Sales	434,484	462,823	841,358	914,175
Aftermarket
Disaggregation of Revenue [Line Items]
Sales	463,694	462,189	914,128	904,351
FPD
Disaggregation of Revenue [Line Items]
Sales	617,434	673,554	1,219,600	1,308,680
FPD | Original Equipment
Disaggregation of Revenue [Line Items]
Sales	220,387	271,465	434,541	524,198
FPD | Aftermarket
Disaggregation of Revenue [Line Items]
Sales	397,047	402,089	785,059	784,482
FCD
Disaggregation of Revenue [Line Items]
Sales	280,744	251,458	535,886	509,846
FCD | Original Equipment
Disaggregation of Revenue [Line Items]
Sales	214,097	191,358	406,817	389,977
FCD | Aftermarket
Disaggregation of Revenue [Line Items]
Sales	66,647	60,100	129,069	119,869
North America
Disaggregation of Revenue [Line Items]
Sales	341,729	376,347	655,950	766,997
North America | FPD
Disaggregation of Revenue [Line Items]
Sales	243,611	269,610	467,582	537,135
North America | FCD
Disaggregation of Revenue [Line Items]
Sales	98,118	106,737	188,368	229,862
Latin America
Disaggregation of Revenue [Line Items]
Sales	61,098	53,814	109,950	101,511
Latin America | FPD
Disaggregation of Revenue [Line Items]
Sales	52,219	46,909	94,256	89,096
Latin America | FCD
Disaggregation of Revenue [Line Items]
Sales	8,879	6,905	15,694	12,415
Middle East And Africa
Disaggregation of Revenue [Line Items]
Sales	96,192	118,427	206,433	242,260
Middle East And Africa | FPD
Disaggregation of Revenue [Line Items]
Sales	69,662	96,740	152,207	193,908
Middle East And Africa | FCD
Disaggregation of Revenue [Line Items]
Sales	26,530	21,687	54,226	48,352
Asia Pacific
Disaggregation of Revenue [Line Items]
Sales	208,319	192,648	411,627	359,660
Asia Pacific | FPD
Disaggregation of Revenue [Line Items]
Sales	119,375	128,102	244,027	240,557
Asia Pacific | FCD
Disaggregation of Revenue [Line Items]
Sales	88,944	64,546	167,600	119,103
Europe
Disaggregation of Revenue [Line Items]
Sales	190,840	183,776	371,526	348,098
Europe | FPD
Disaggregation of Revenue [Line Items]
Sales	132,567	132,193	261,528	247,984
Europe | FCD
Disaggregation of Revenue [Line Items]
Sales	$ 58,273	$ 51,583	$ 109,998	$ 100,114

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