Segment Information (Details) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) segments	Jun. 30, 2015 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| segments			4
Reconciliation from Segment Totals to Consolidated [Abstract]
Revenue	$ 1,686,345	$ 1,758,628	$ 3,308,618	$ 3,474,129
Reconciliation of Earnings from Continuing Operations from Segments to Consolidated [Abstract]
Interest expense, net	32,157	31,988	63,871	64,025
Earnings before provision for income taxes and discontinued operations	164,499	221,141	292,123	385,816
Provision for income taxes	46,209	65,507	74,477	112,992
Earnings from continuing operations	118,290	155,634	217,646	272,824
Energy Segment [Member]
Reconciliation from Segment Totals to Consolidated [Abstract]
Revenue	259,008	366,044	542,238	796,467
Reconciliation of Earnings from Continuing Operations from Segments to Consolidated [Abstract]
Earnings before provision for income taxes and discontinued operations	(75)	40,909	11,169	93,214
Engineered Systems Segment [Member]
Reconciliation from Segment Totals to Consolidated [Abstract]
Revenue	592,432	593,091	1,169,427	1,166,287
Reconciliation of Earnings from Continuing Operations from Segments to Consolidated [Abstract]
Earnings before provision for income taxes and discontinued operations	104,034	96,702	197,782	184,851
Fluids Segment [Member]
Reconciliation from Segment Totals to Consolidated [Abstract]
Revenue	405,838	351,511	804,900	691,747
Reconciliation of Earnings from Continuing Operations from Segments to Consolidated [Abstract]
Earnings before provision for income taxes and discontinued operations	54,033	70,168	100,080	124,802
Refrigeration and Food Equipment Segment [Member]
Reconciliation from Segment Totals to Consolidated [Abstract]
Revenue	429,386	448,115	792,638	820,212
Reconciliation of Earnings from Continuing Operations from Segments to Consolidated [Abstract]
Earnings before provision for income taxes and discontinued operations	63,230	65,732	101,391	101,882
Intersegment Elimination [Member]
Reconciliation from Segment Totals to Consolidated [Abstract]
Revenue	(319)	(133)	(585)	(584)
Total segments [Member]
Reconciliation of Earnings from Continuing Operations from Segments to Consolidated [Abstract]
Earnings before provision for income taxes and discontinued operations	221,222	273,511	410,422	504,749
Corporate expense / other [Member]
Reconciliation of Earnings from Continuing Operations from Segments to Consolidated [Abstract]
Earnings before provision for income taxes and discontinued operations	$ 24,566	$ 20,382	$ 54,428	$ 54,908

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