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Share-Based Compensation (Summary of Income Tax Benefit Related to Share-Based Compensation) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options	$ 301	$ 791
Restricted stock	162	273
Total	$ 463	$ 1,064

X

- Definition

Tax benefit from share-based compensation related to options.

+ References

No definition available.

+ Details

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X

- Definition

Employee Service Share Based Compensation Tax (Expense) Benefit From Compensation Expense Restricted Stock

+ References

No definition available.

+ Details

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- References

No definition available.

+ Details

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X

- Definition

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

+ 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 (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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