Share Compensation (Stock Option Activity Narrative) (Details) - Employee Stock Option [Member] $ / shares in Units, $ in Millions	3 Months Ended
Mar. 31, 2017 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share-based compensation expense related to unvested options \| $	$ 0.2
Amortized over a weighted average period	1 year 7 months 6 days
Weighted average exercise price of vested options (in dollars per share) \| $ / shares	$ 16.64

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.

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=6415400&loc=d3e5070-113901

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