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Stock-Based Compensation (Summary Of Stock Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Stock-Based Compensation [Abstract]
Shares, Outstanding at beginning of year	96,379
Shares Expired		(200)
Shares Cancelled or Forfeited
Shares, Outstanding at end of period	96,379
Shares, Exercisable at end of period	96,379
Weighted Average Exercise Price, Outstanding at beginning of year	$ 7.65
Weighted Average Exercise Price, Expired
Weighted Average Exercise Price, Cancelled or Forfeited
Weighted Average Exercise Price, Outstanding at end of period	7.65
Weighted Average Exercise Price, Exercisable at end of period	$ 7.65
Weighted average remaining contractual term, Outstanding at end of period	4 years 2 months 12 days
Weighted average remaining contractual term, Exercisable at end of period	4 years 2 months 12 days
Intrinsic value, Outstanding at end of period	$ 500,919
Intrinsic value, Exercisable at end of period	$ 500,919

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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.

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

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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.

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

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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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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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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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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 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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Weighted average remaining contractual term for fully vested and expected to vest exercisable or convertible options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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