Restructuring Activities Restructuring Charges (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Costs, Expected Cost Remaining	$ 2,900		$ 2,900
Severance Costs	1,186	$ 1,989	2,526	$ 5,681
Restructuring and Other	3,856	35	7,142	317
Restructuring Costs	5,042	2,024	9,668	5,998
Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs	31	981	679	3,342
Restructuring and Other	1,968	0	3,794	0
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs	1,155	1,008	1,847	2,339
Restructuring and Other	1,888	35	3,348	317
Energy & Chemicals [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Costs, Expected Cost Remaining	200		200
Restructuring Costs	1,657	369	2,083	662
Distribution & Storage [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Costs, Expected Cost Remaining	1,300		1,300
Restructuring Costs	300	1,618	437	3,811
BioMedical [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Costs, Expected Cost Remaining	400		400
Restructuring Costs	1,407	37	4,011	521
Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Costs, Expected Cost Remaining	1,000		1,000
Restructuring Costs	$ 1,678	$ 0	$ 3,137	$ 1,004