Restructuring Activities Restructuring Charges (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Restructuring Cost and Reserve [Line Items]
Severance Costs	$ 972	$ 202	$ 3,498	$ 5,883
Restructuring and Other	1,777	103	8,919	420
Restructuring Costs	2,749	305	12,417	6,303
Restructuring and Related Costs, Expected Cost Remaining	1,530		1,530
Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs	52	159	731	3,501
Restructuring and Other	278	0	4,072	0
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs	920	43	2,767	2,382
Restructuring and Other	1,499	103	4,847	420
Energy & Chemicals [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	162	159	2,245	821
Distribution & Storage [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	648	118	1,085	3,929
Restructuring and Related Costs, Expected Cost Remaining	1,000		1,000
BioMedical [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	516	0	4,527	521
Restructuring and Related Costs, Expected Cost Remaining	310		310
Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	1,423	$ 28	4,560	$ 1,032
Restructuring and Related Costs, Expected Cost Remaining	$ 220		$ 220