Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Summarized financial information of the reportable segments
Sales	$ 863,626	$ 947,248
Segment operating income (loss)	47,016	74,410
Intersegment sales
Summarized financial information of the reportable segments
Sales	0	0
Engineered Product Division
Summarized financial information of the reportable segments
Sales	414,381	464,226
Segment operating income (loss)	44,582	58,382
Engineered Product Division | Intersegment sales
Summarized financial information of the reportable segments
Sales	7,592	9,613
Industrial Product Division
Summarized financial information of the reportable segments
Sales	169,999	186,704
Segment operating income (loss)	(14,191)	3,998
Industrial Product Division | Intersegment sales
Summarized financial information of the reportable segments
Sales	8,378	10,746
Flow Control Division
Summarized financial information of the reportable segments
Sales	279,246	296,318
Segment operating income (loss)	40,094	38,850
Flow Control Division | Intersegment sales
Summarized financial information of the reportable segments
Sales	1,191	2,668
Subtotal–Reportable Segments
Summarized financial information of the reportable segments
Sales	863,626	947,248
Segment operating income (loss)	70,485	101,230
Subtotal–Reportable Segments | Intersegment sales
Summarized financial information of the reportable segments
Sales	17,161	23,027
Eliminations and All Other
Summarized financial information of the reportable segments
Sales	0	0
Segment operating income (loss)	(23,469)	(26,820)
Eliminations and All Other | Intersegment sales
Summarized financial information of the reportable segments
Sales	$ (17,161)	$ (23,027)