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Restructuring Activities Restructuring Accruals (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]
Beginning Balance, Restructuring Accrual	$ 6,635	$ 7,347	$ 7,324	$ 5,832
Restructuring Costs	5,042	2,024	9,668	5,998
Payments for Restructuring	(7,472)	(3,387)	(12,787)	(5,846)
Ending Balance, Restructuring Reserve	4,205	5,984	4,205	5,984
Energy & Chemicals [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance, Restructuring Accrual	0	544	127	1,106
Restructuring Costs	1,657	369	2,083	662
Payments for Restructuring	(1,657)	(369)	(2,210)	(1,224)
Ending Balance, Restructuring Reserve	0	544	0	544
Distribution & Storage [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance, Restructuring Accrual	2,265	5,254	2,864	3,446
Restructuring Costs	300	1,618	437	3,811
Payments for Restructuring	(700)	(2,076)	(1,436)	(2,461)
Ending Balance, Restructuring Reserve	1,865	4,796	1,865	4,796
BioMedical [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance, Restructuring Accrual	1,439	474	1,308	430
Restructuring Costs	1,407	37	4,011	521
Payments for Restructuring	(1,999)	(143)	(4,472)	(583)
Ending Balance, Restructuring Reserve	847	368	847	368
Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance, Restructuring Accrual	2,931	1,075	3,025	850
Restructuring Costs	1,678	0	3,137	1,004
Payments for Restructuring	(3,116)	(799)	(4,669)	(1,578)
Ending Balance, Restructuring Reserve	$ 1,493	$ 276	$ 1,493	$ 276

X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585

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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.P.3)
-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 230
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-Section 45
-Paragraph 28
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-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
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-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
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-Section S99
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- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 5.P.4(b))
-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

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-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

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