Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Net earnings of Flowserve Corporation	$ 57,261	$ 15,143
Dividends on restricted shares not expected to vest	0	0
Earnings attributable to common and participating shareholders	$ 57,261	$ 15,143
Weighted average shares:
Common stock (in shares)	130,962	130,713
Participating securities (in shares)	20	48
Denominator for basic earnings per common share (in shares)	130,982	130,761
Effect of potentially dilutive securities (in shares)	550	334
Denominator for diluted earnings per common share (in shares)	131,532	131,095
Earnings per common share:
Basic (in dollars per share)	$ 0.44	$ 0.12
Diluted (in dollars per share)	$ 0.44	$ 0.12