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Business - Additional Information (Q3) (Details) - Country	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Product Information [Line Items]
Number of countries company operates	31	31
Number of countries where product is found (more than)		100
Sales Revenue Outside United States | Customer Concentration Risk
Product Information [Line Items]
Revenues from customers outside the U.S. (as a percent)	66.00%
Minimum
Product Information [Line Items]
Number of countries where product is found (more than)	100

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611

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- Definition

The number of countries in which the entity operates as of balance sheet date.

+ References

No definition available.

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- Definition

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+ References

No definition available.

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- Definition

Number of countries where product found.

+ References

No definition available.

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