Revenue Recognition (Disaggregation of revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Sales	$ 924,301	$ 995,709	$ 2,742,826	$ 2,871,517
Original Equipment
Disaggregation of Revenue [Line Items]
Sales	479,423	508,111	1,393,598	1,416,236
Aftermarket
Disaggregation of Revenue [Line Items]
Sales	444,878	487,598	1,349,228	1,455,281
FPD
Disaggregation of Revenue [Line Items]
Sales	669,535	682,798	1,978,215	1,965,523
FPD | Original Equipment
Disaggregation of Revenue [Line Items]
Sales	280,951	256,664	805,150	706,092
FPD | Aftermarket
Disaggregation of Revenue [Line Items]
Sales	388,584	426,134	1,173,065	1,259,431
FCD
Disaggregation of Revenue [Line Items]
Sales	254,766	312,911	764,611	905,994
FCD | Original Equipment
Disaggregation of Revenue [Line Items]
Sales	198,472	251,447	588,448	710,144
FCD | Aftermarket
Disaggregation of Revenue [Line Items]
Sales	56,294	61,464	176,163	195,850
North America
Disaggregation of Revenue [Line Items]
Sales	341,717	413,464	1,108,674	1,199,013
North America | FPD
Disaggregation of Revenue [Line Items]
Sales	245,282	279,583	782,403	797,092
North America | FCD
Disaggregation of Revenue [Line Items]
Sales	96,435	133,881	326,271	401,921
Latin America
Disaggregation of Revenue [Line Items]
Sales	53,411	59,020	154,923	158,290
Latin America | FPD
Disaggregation of Revenue [Line Items]
Sales	47,346	51,338	136,443	134,716
Latin America | FCD
Disaggregation of Revenue [Line Items]
Sales	6,065	7,682	18,480	23,574
Middle East And Africa
Disaggregation of Revenue [Line Items]
Sales	112,375	111,703	354,635	319,178
Middle East And Africa | FPD
Disaggregation of Revenue [Line Items]
Sales	83,330	87,982	277,231	249,694
Middle East And Africa | FCD
Disaggregation of Revenue [Line Items]
Sales	29,045	23,721	77,404	69,484
Asia Pacific
Disaggregation of Revenue [Line Items]
Sales	218,063	214,999	577,742	591,068
Asia Pacific | FPD
Disaggregation of Revenue [Line Items]
Sales	151,227	129,047	391,796	367,204
Asia Pacific | FCD
Disaggregation of Revenue [Line Items]
Sales	66,836	85,952	185,946	223,864
Europe
Disaggregation of Revenue [Line Items]
Sales	198,735	196,523	546,852	603,968
Europe | FPD
Disaggregation of Revenue [Line Items]
Sales	142,350	134,848	390,342	416,817
Europe | FCD
Disaggregation of Revenue [Line Items]
Sales	$ 56,385	$ 61,675	$ 156,510	$ 187,151