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Restructuring Activities Restructuring Accruals (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Restructuring Cost and Reserve [Line Items]    
Beginning Balance, Restructuring Accrual $ 7,324 $ 5,832
Restructuring Charges 4,626 3,973
Payments for Restructuring (5,315) (2,458)
Ending Balance, Restructuring Reserve 6,635 7,347
Energy & Chemicals [Member]    
Restructuring Cost and Reserve [Line Items]    
Beginning Balance, Restructuring Accrual 127 1,106
Restructuring Charges 426 292
Payments for Restructuring (553) (854)
Ending Balance, Restructuring Reserve 0 544
Distribution & Storage [Member]    
Restructuring Cost and Reserve [Line Items]    
Beginning Balance, Restructuring Accrual 2,864 3,446
Restructuring Charges 137 2,193
Payments for Restructuring (736) (385)
Ending Balance, Restructuring Reserve 2,265 5,254
BioMedical [Member]    
Restructuring Cost and Reserve [Line Items]    
Beginning Balance, Restructuring Accrual 1,308 430
Restructuring Charges 2,604 484
Payments for Restructuring (2,473) (440)
Ending Balance, Restructuring Reserve 1,439 474
Corporate [Member]    
Restructuring Cost and Reserve [Line Items]    
Beginning Balance, Restructuring Accrual 3,025 850
Restructuring Charges 1,459 1,004
Payments for Restructuring (1,553) (779)
Ending Balance, Restructuring Reserve $ 2,931 $ 1,075