Revenue Recognition (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Sales	$ 1,068,200	$ 996,500	$ 990,100	$ 890,100	$ 986,900	$ 952,700	$ 973,100	$ 920,000	$ 3,944,850	$ 3,832,666	$ 3,660,831
FPD
Disaggregation of Revenue [Line Items]
Sales									2,704,445	2,620,488	2,477,738
FCD
Disaggregation of Revenue [Line Items]
Sales									1,240,405	1,212,178	1,183,093
Original Equipment
Disaggregation of Revenue [Line Items]
Sales									1,967,143	1,936,055	1,875,746
Original Equipment | FPD
Disaggregation of Revenue [Line Items]
Sales									994,719	992,162	968,856
Original Equipment | FCD
Disaggregation of Revenue [Line Items]
Sales									972,424	943,893	906,890
Aftermarket
Disaggregation of Revenue [Line Items]
Sales									1,977,707	1,896,611	1,785,085
Aftermarket | FPD
Disaggregation of Revenue [Line Items]
Sales									1,709,726	1,628,326	1,508,882
Aftermarket | FCD
Disaggregation of Revenue [Line Items]
Sales									267,981	268,285	276,203
North America
Disaggregation of Revenue [Line Items]
Sales									1,629,613	1,577,953	1,446,692
North America | FPD
Disaggregation of Revenue [Line Items]
Sales									1,085,627	1,037,637	969,417
North America | FCD
Disaggregation of Revenue [Line Items]
Sales									543,986	540,316	477,275
Latin America
Disaggregation of Revenue [Line Items]
Sales									231,146	241,781	202,178
Latin America | FPD
Disaggregation of Revenue [Line Items]
Sales									202,247	219,376	168,971
Latin America | FCD
Disaggregation of Revenue [Line Items]
Sales									28,899	22,405	33,207
Middle East and Africa
Disaggregation of Revenue [Line Items]
Sales									454,896	467,724	482,813
Middle East and Africa | FPD
Disaggregation of Revenue [Line Items]
Sales									355,937	329,484	327,366
Middle East and Africa | FCD
Disaggregation of Revenue [Line Items]
Sales									98,959	138,240	155,447
Asia Pacific
Disaggregation of Revenue [Line Items]
Sales									819,167	781,668	684,198
Asia Pacific | FPD
Disaggregation of Revenue [Line Items]
Sales									499,932	502,559	445,001
Asia Pacific | FCD
Disaggregation of Revenue [Line Items]
Sales									319,235	279,109	239,197
Europe
Disaggregation of Revenue [Line Items]
Sales									810,028	763,540	844,950
Europe | FPD
Disaggregation of Revenue [Line Items]
Sales									560,702	531,432	566,983
Europe | FCD
Disaggregation of Revenue [Line Items]
Sales									$ 249,326	$ 232,108	$ 277,967