Share Based Compensation - Narrative (Details) $ in Millions	3 Months Ended
Mar. 31, 2018 USD ($) shares
Share Based Compensation [Abstract]
Option Award Vesting Period	3 years
Employee Stock Option [Member]
Share Based Compensation [Line Items]
Unrecognized Share-Based Compensation Expense, Stock Option Awards	$ 2.1
Weighted Average Remaining Life, Nonvested Stock Awards	2 years 3 months
Restricted Stock [Member]
Share Based Compensation [Line Items]
Unrecognized Share-based Compensation Expense, Nonvested Stock Award	$ 3.2
Weighted Average Remaining Life, Nonvested Stock Awards	2 years 2 months
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period \| shares	12,807
Restricted Stock Units (RSUs) [Member]
Share Based Compensation [Line Items]
Unrecognized Share-based Compensation Expense, Nonvested Stock Award	$ 0.3
Weighted Average Remaining Life, Nonvested Stock Awards	2 years 5 months
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period \| shares	1,480

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

+ References

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

+ References

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- References

No definition available.

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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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