Share-Based Compensation - Summary of Stock Option Activity (Details)	9 Months Ended
Sep. 30, 2018 $ / shares shares
Options outstanding and exercisable
Options outstanding and exercisable Beginning Balance, Shares \| shares	63,773
Exercised, Shares \| shares	(5,084)
Option outstanding and exercisable Ending Balance, Shares \| shares	58,689
Weighted-Average Exercise Price
Options outstanding and exercisable Beginning Balance, Weighted-Average Exercise Price \| $ / shares	$ 16.62
Exercised, Weighted-Average Exercise Price \| $ / shares	16.62
Options outstanding and exercisable Ending Balance, Weighted-Average Exercise Price \| $ / shares	$ 16.62

No definition available.

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

+ References

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- Definition

Number of share options (or share units) exercised during the current period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

Share based compensation arrangement by share based payment award options outstanding and exercisable number.

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Share based compensation arrangement by share based payment award options outstanding and exercisable roll forward.

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- Definition

Share based compensation arrangement by share based payment award options outstanding and exercisable weighted average exercise price.

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No definition available.

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