Income Taxes (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017
Income Taxes [Abstract]
Effective tax rate	4.40%	1.50%
Minimum percentage realization for recognition of income tax position	50.00%
Unrecognized tax benefits	$ 0.3
Total accrued interest relating to unrecognized tax benefits	$ 0.1

Minimum percentage realization for recognition of income tax position (in hundredths)

No definition available.

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- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(2))
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-Topic 740
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-Topic 740
-SubTopic 10
-Section 50
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- References

No definition available.

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- Definition

Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 10B
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-Topic 740
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- Definition

Amount of interest expense accrued for an underpayment of income taxes.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
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-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

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