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Revenue Recognition (Disaggregation of revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Sales	$ 866,118	$ 924,301	$ 2,621,604	$ 2,742,826
Original Equipment
Disaggregation of Revenue [Line Items]
Sales	425,248	479,423	1,266,617	1,393,598
Aftermarket
Disaggregation of Revenue [Line Items]
Sales	440,870	444,878	1,354,987	1,349,228
FPD
Disaggregation of Revenue [Line Items]
Sales	601,108	669,535	1,820,708	1,978,215
FPD | Original Equipment
Disaggregation of Revenue [Line Items]
Sales	223,358	280,951	657,910	805,150
FPD | Aftermarket
Disaggregation of Revenue [Line Items]
Sales	377,750	388,584	1,162,798	1,173,065
FCD
Disaggregation of Revenue [Line Items]
Sales	265,010	254,766	800,896	764,611
FCD | Original Equipment
Disaggregation of Revenue [Line Items]
Sales	201,890	198,472	608,707	588,448
FCD | Aftermarket
Disaggregation of Revenue [Line Items]
Sales	63,120	56,294	192,189	176,163
North America
Disaggregation of Revenue [Line Items]
Sales	325,984	341,717	981,929	1,108,674
North America | FPD
Disaggregation of Revenue [Line Items]
Sales	230,130	245,282	697,712	782,403
North America | FCD
Disaggregation of Revenue [Line Items]
Sales	95,854	96,435	284,217	326,271
Latin America
Disaggregation of Revenue [Line Items]
Sales	70,763	53,411	180,717	154,923
Latin America | FPD
Disaggregation of Revenue [Line Items]
Sales	63,443	47,346	157,703	136,443
Latin America | FCD
Disaggregation of Revenue [Line Items]
Sales	7,320	6,065	23,014	18,480
Middle East And Africa
Disaggregation of Revenue [Line Items]
Sales	95,567	112,375	302,005	354,635
Middle East And Africa | FPD
Disaggregation of Revenue [Line Items]
Sales	71,296	83,330	223,502	277,231
Middle East And Africa | FCD
Disaggregation of Revenue [Line Items]
Sales	24,271	29,045	78,503	77,404
Asia Pacific
Disaggregation of Revenue [Line Items]
Sales	201,691	218,063	613,314	577,742
Asia Pacific | FPD
Disaggregation of Revenue [Line Items]
Sales	117,424	151,227	361,450	391,796
Asia Pacific | FCD
Disaggregation of Revenue [Line Items]
Sales	84,267	66,836	251,864	185,946
Europe
Disaggregation of Revenue [Line Items]
Sales	172,113	198,735	543,639	546,852
Europe | FPD
Disaggregation of Revenue [Line Items]
Sales	118,815	142,350	380,341	390,342
Europe | FCD
Disaggregation of Revenue [Line Items]
Sales	$ 53,298	$ 56,385	$ 163,298	$ 156,510

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