Stock Based Compensation (Summary Of Stock Option Activity) (Details)	6 Months Ended
Jun. 30, 2018 USD ($) $ / shares shares
Stock Based Compensation[Abstract]
Options outstanding, January 1, 2018, Shares \| shares	636
Options outstanding, granted, Shares \| shares
Options outstanding, exercised, Shares \| shares
Options outstanding, forfeited, Shares \| shares	(636)
Options outstanding, June 30, 2018, Shares \| shares
Options exercisable, June 30, 2018, Shares \| shares
Options outstanding, January 1, 2018, Weighted Average Exercise Price \| $ / shares	$ 12.79
Options outstanding, granted, Weighted Average Exercise Price \| $ / shares
Options outstanding, exercised, Weighted Average Exercise Price \| $ / shares
Options outstanding, forfeited, Weighted Average Exercise Price \| $ / shares	12.79
Options outstanding, June 30, 2018, Weighted Average Exercise Price \| $ / shares
Options exercisable, June 30, 2018, Weighted Average Exercise Price \| $ / shares
Options outstanding, June 30, 2018, Weighted Average Remaining Contractual Life (in years)	0 years
Options exercisable, June 30, 2018, Weighted Average Remaining Contractual Life (in years)	0 years
Options outstanding, June 30, 2018, Intrinsic Value \| $
Options exercisable, June 30, 2018, Intrinsic Value \| $

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option 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)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

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- Definition

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
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

+ References

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- Definition

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

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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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- Definition

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

+ References

No definition available.

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

+ References

No definition available.

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

+ References

No definition available.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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Stock Based Compensation (Summary Of Stock Option Activity) (Details)	6 Months Ended
	Jun. 30, 2018 USD ($) $ / shares shares
Stock Based Compensation[Abstract]
Options outstanding, January 1, 2018, Shares \| shares	636
Options outstanding, granted, Shares \| shares
Options outstanding, exercised, Shares \| shares
Options outstanding, forfeited, Shares \| shares	(636)
Options outstanding, June 30, 2018, Shares \| shares
Options exercisable, June 30, 2018, Shares \| shares
Options outstanding, January 1, 2018, Weighted Average Exercise Price \| $ / shares	$ 12.79
Options outstanding, granted, Weighted Average Exercise Price \| $ / shares
Options outstanding, exercised, Weighted Average Exercise Price \| $ / shares
Options outstanding, forfeited, Weighted Average Exercise Price \| $ / shares	12.79
Options outstanding, June 30, 2018, Weighted Average Exercise Price \| $ / shares
Options exercisable, June 30, 2018, Weighted Average Exercise Price \| $ / shares
Options outstanding, June 30, 2018, Weighted Average Remaining Contractual Life (in years)	0 years
Options exercisable, June 30, 2018, Weighted Average Remaining Contractual Life (in years)	0 years
Options outstanding, June 30, 2018, Intrinsic Value \| $
Options exercisable, June 30, 2018, Intrinsic Value \| $