Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Summarized financial information of the reportable segments
Sales	$ 947,248	$ 1,014,620
Segment operating income	74,410	93,376
Intersegment sales
Summarized financial information of the reportable segments
Sales	0	0
Engineered Product Division
Summarized financial information of the reportable segments
Sales	464,226	473,413
Segment operating income	58,382	68,828
Engineered Product Division | Intersegment sales
Summarized financial information of the reportable segments
Sales	9,613	10,747
Industrial Product Division
Summarized financial information of the reportable segments
Sales	186,704	214,711
Segment operating income	3,998	(13,338)
Industrial Product Division | Intersegment sales
Summarized financial information of the reportable segments
Sales	10,746	8,655
Flow Control Division
Summarized financial information of the reportable segments
Sales	296,318	326,496
Segment operating income	38,850	54,715
Flow Control Division | Intersegment sales
Summarized financial information of the reportable segments
Sales	2,668	667
Subtotal–Reportable Segments
Summarized financial information of the reportable segments
Sales	947,248	1,014,620
Segment operating income	101,230	110,205
Subtotal–Reportable Segments | Intersegment sales
Summarized financial information of the reportable segments
Sales	23,027	20,069
Eliminations and All Other
Summarized financial information of the reportable segments
Sales	0	0
Segment operating income	(26,820)	(16,829)
Eliminations and All Other | Intersegment sales
Summarized financial information of the reportable segments
Sales	$ (23,027)	$ (20,069)