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Restructuring Activities (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve |  | $ 7,324 | $ 5,832
Severance Costs |  | 10,928 | 4,810
Severance Costs |  |  | 7,448
Restructuring Charges |  | 10,928 |
Payments for Restructuring |  | (9,436) |
Cost of Sales [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance Costs |  | 4,412 | 1,700
Selling, General and Administrative Expenses [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance Costs |  | 6,516 | 2,960
Asset Impairment [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance Costs |  |  | 150
Corporate [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve |  | 3,025 | 850
Restructuring Charges |  | 4,167 |
Payments for Restructuring |  | (1,992) |
BioMedical [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve |  | 1,308 | 430
Restructuring Charges |  | 1,957 |
Payments for Restructuring |  | (1,079) |
Energy & Chemicals [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve |  | 127 | 1,106
Restructuring Charges |  | 962 |
Payments for Restructuring |  | (1,941) |
Distribution & Storage [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve |  | 2,864 | $ 3,446
Restructuring and Related Cost, Expected Cost Remaining |  | 2,152 |
Restructuring Charges |  | 3,842 |
Payments for Restructuring |  | $ (4,424) |
Scenario, Forecast [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance Costs | $ 10,400 |  |
Scenario, Forecast [Member] | Corporate [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance Costs | 3,300 |  |
Scenario, Forecast [Member] | BioMedical [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance Costs | 2,900 |  |
Scenario, Forecast [Member] | Energy & Chemicals [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance Costs | 3,000 |  |
Scenario, Forecast [Member] | Distribution & Storage [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance Costs | $ 1,200 |  |

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