Segment Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) segments	Mar. 31, 2018 USD ($)
Segment Reporting [Abstract]
Fluids Segment Earnings Excluding Loss on Finder	$ 99,167
Segment Reporting Information [Line Items]
Spin-off Costs Incurred to Date		$ 11,746
Number of reportable segments | segments	3
Reconciliation from Segment Totals to Consolidated [Abstract]
Revenues	$ 1,724,757	1,637,671
Interest Expense	31,808	35,640
Interest Income	(890)	(2,058)
Earnings before provision for income taxes	138,318	134,251
Provision for income taxes	(32,613)	(24,841)
Earnings from continuing operations	105,705	109,410
Engineered Systems Segment [Member]
Reconciliation from Segment Totals to Consolidated [Abstract]
Revenues	687,191	671,626
Earnings before provision for income taxes	123,074	102,066
Fluids Segment [Member]
Reconciliation from Segment Totals to Consolidated [Abstract]
Revenues	703,224	628,098
Earnings before provision for income taxes	52,221	67,348
Refrigeration and Food Equipment Segment [Member]
Reconciliation from Segment Totals to Consolidated [Abstract]
Revenues	334,643	338,235
Earnings before provision for income taxes	24,807	29,182
Intersegment Eliminations [Member]
Reconciliation from Segment Totals to Consolidated [Abstract]
Revenues	(301)	(288)
Total segments [Member]
Reconciliation from Segment Totals to Consolidated [Abstract]
Earnings before provision for income taxes	200,102	198,596
Corporate expense / other [Member]
Reconciliation from Segment Totals to Consolidated [Abstract]
Earnings before provision for income taxes	$ 30,866	$ 30,763