SEGMENT INFORMATION SEGMENT INFORMATION (Product Line) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Net sales	$ 611,881	$ 567,901	$ 567,653	$ 523,591	$ 565,566	$ 507,092	$ 532,766	$ 503,507	$ 2,271,026	$ 2,108,931	$ 2,205,683
Flow Control [Member]
Segment Reporting Information [Line Items]
Net sales									899,705	883,735	949,657
Controls [Member]
Segment Reporting Information [Line Items]
Net sales									1,075,218	940,162	947,758
Surface Technologies [Member]
Segment Reporting Information [Line Items]
Net sales									$ 296,103	$ 285,034	$ 308,268