Revenue Recognition (Disaggregation of revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Sales	$ 894,457	$ 890,051
Original Equipment
Disaggregation of Revenue [Line Items]
Sales	452,295	419,850
Aftermarket
Disaggregation of Revenue [Line Items]
Sales	442,162	470,201
FPD
Disaggregation of Revenue [Line Items]
Sales	635,126	608,759
FPD | Original Equipment
Disaggregation of Revenue [Line Items]
Sales	252,732	205,803
FPD | Aftermarket
Disaggregation of Revenue [Line Items]
Sales	382,394	402,956
FCD
Disaggregation of Revenue [Line Items]
Sales	259,331	281,292
FCD | Original Equipment
Disaggregation of Revenue [Line Items]
Sales	199,563	214,047
FCD | Aftermarket
Disaggregation of Revenue [Line Items]
Sales	59,768	67,245
North America
Disaggregation of Revenue [Line Items]
Sales	390,642	382,946
North America | FPD
Disaggregation of Revenue [Line Items]
Sales	267,524	247,769
North America | FCD
Disaggregation of Revenue [Line Items]
Sales	123,118	135,177
Latin America
Disaggregation of Revenue [Line Items]
Sales	47,698	43,397
Latin America | FPD
Disaggregation of Revenue [Line Items]
Sales	42,187	37,601
Latin America | FCD
Disaggregation of Revenue [Line Items]
Sales	5,511	5,796
Middle East And Africa
Disaggregation of Revenue [Line Items]
Sales	123,831	97,257
Middle East And Africa | FPD
Disaggregation of Revenue [Line Items]
Sales	97,168	74,366
Middle East And Africa | FCD
Disaggregation of Revenue [Line Items]
Sales	26,663	22,891
Asia Pacific
Disaggregation of Revenue [Line Items]
Sales	167,962	171,140
Asia Pacific | FPD
Disaggregation of Revenue [Line Items]
Sales	112,455	113,948
Asia Pacific | FCD
Disaggregation of Revenue [Line Items]
Sales	55,507	57,192
Europe
Disaggregation of Revenue [Line Items]
Sales	164,324	195,311
Europe | FPD
Disaggregation of Revenue [Line Items]
Sales	115,792	135,075
Europe | FCD
Disaggregation of Revenue [Line Items]
Sales	$ 48,532	$ 60,236