SEGMENT INFORMATION (Detail) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Segment Reporting Information [Line Items]
Net sales	$ 514,905	$ 462,165	$ 976,755	$ 903,940
Operating income	51,689	43,428	93,372	74,512
Total assets	2,378,165		2,378,165		2,242,018
Flow Control [Member]
Segment Reporting Information [Line Items]
Net sales	266,614	251,855	505,756	492,586
Operating income	26,532	24,855	45,164	41,524
Total assets	1,158,405		1,158,405		1,102,417
Motion Control [Member]
Segment Reporting Information [Line Items]
Net sales	176,893	159,491	337,163	307,736
Operating income	18,804	18,343	35,090	32,296
Total assets	921,289		921,289		873,074
Metal Treatment [Member]
Segment Reporting Information [Line Items]
Net sales	72,059	54,880	135,320	108,830
Operating income	10,407	6,457	20,464	12,497
Total assets	265,472		265,472		233,356
Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Net sales	(661)	(4,061)	(1,484)	(5,212)
Corporate Elimination [Member]
Segment Reporting Information [Line Items]
Operating income	(4,054)	(6,227)	(7,346)	(11,805)
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Total assets	$ 32,999		$ 32,999		$ 33,171