Shareholders' Equity (Summary of Stock Option Activity) (Details)	12 Months Ended
Dec. 31, 2016 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Options Outstanding at Beginning of Period (in shares) \| shares	7,000
Number of Options Granted (in shares) \| shares	0
Number of Options Exercised (in shares) \| shares	(7,000)
Number of Options Forfeited (in shares) \| shares	0
Number of Options Expired (in shares) \| shares	0
Number of Options Outstanding and Exercisable at End of Period (in shares) \| shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Price of Options Outstanding at Beginning of Period (in USD per share) \| $ / shares	$ 13.25
Weighted Average Price of Options Granted (in USD per share) \| $ / shares	0.00
Weighted Average Price of Options Exercised (in USD per share) \| $ / shares	13.25
Weighted Average Price of Options Forfeited (in USD per share) \| $ / shares	0.00
Weighted Average Price of Options Expired (in USD per share) \| $ / shares	$ 0.00
Weighted Average Price of Options Outstanding and Exercisable at End of Period (in USD per share) \| $ / shares
Weighted Average Life of Options (in years) Outstanding and Exercisable at End of Period	0 years

Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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)(1)(iv)(4)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 718
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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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