SEGMENT INFORMATION SEGMENT INFORMATION (Product Line) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Net Sales	$ 668,444	$ 571,614	$ 550,047	$ 601,231	$ 655,771	$ 614,880	$ 638,996	$ 578,314	$ 2,391,336	$ 2,487,961	$ 2,411,835
Flow Control [Member]
Segment Reporting Information [Line Items]
Net Sales									1,037,155	1,051,821	1,008,262
Controls [Member]
Segment Reporting Information [Line Items]
Net Sales									1,098,184	1,130,593	1,090,703
Surface Technologies [Member]
Segment Reporting Information [Line Items]
Net Sales									$ 255,997	$ 305,547	$ 312,870