Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 407.8
Revenue from Contract with Customer, Excluding Assessed Tax	964,313,000	$ 1,013,470,000
Accounts Receivable, after Allowance for Credit Loss, Current	125,422,000
Contract with Customer, Asset, after Allowance for Credit Loss	46,912,000	52,781,000
Contract with Customer, Liability	35,007,000	41,951,000
Energy Segment
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	240,982,000	288,877,000
Energy Segment | Oil and Gas - Upstream, Midstream and Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	54,818,000	67,738,000
Energy Segment | Oil and Gas - Downstream [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	186,164,000	221,139,000
Aerospace & Defense Segment
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	272,625,000	237,017,000
Aerospace & Defense Segment | Commercial Aerospace and Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	124,023,000	105,914,000
Aerospace & Defense Segment | Defense [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	148,602,000	131,103,000
Industrial Segment
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	450,706,000	487,576,000
Industrial Segment | Valves [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	113,386,000	117,492,000
Industrial Segment | Pumps [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	337,320,000	370,084,000
EMEA | Energy Segment
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	83,685,000	84,174,000
EMEA | Aerospace & Defense Segment
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	74,657,000	65,634,000
EMEA | Industrial Segment
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	209,302,000	238,177,000
North America | Energy Segment
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	118,061,000	158,649,000
North America | Aerospace & Defense Segment
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	172,676,000	148,968,000
North America | Industrial Segment
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	147,912,000	151,147,000
Other | Energy Segment
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	39,236,000	46,054,000
Other | Aerospace & Defense Segment
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	25,292,000	22,415,000
Other | Industrial Segment
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	93,492,000	98,252,000
Accounting Standards Update 2014-09 [Member]
Disaggregation of Revenue [Line Items]
Increase (Decrease) in Accounts and Other Receivables	(41,759,000)
Contract with Customer, Liability, Period Increase (Decrease)	(6,944,000)
Accounts Receivable, after Allowance for Credit Loss, Current		$ 167,181,000
Contract with Customer, Asset, Period Increase (Decrease)	$ 5,869,000