Earning Per Common Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Numerator for basic and diluted earnings (loss) per common share:
Net income (loss)	$ 3,024	$ (91,996)	$ 602	$ (94,828)
Denominator:
Weighted average shares outstanding (shares)	10,335	10,263	10,327	10,248
Denominator for basic earnings per common share (shares)	10,335	10,263	10,327	10,248
Effect of dilutive securities:
Other stock compensation plans (shares)	148	0	200	0
Dilutive potential common shares (shares)	148	0	200	0
Denominator for diluted earnings per common share - adjusted weighted average shares outstanding and assumed conversions (shares)	10,483	10,263	10,527	10,248
Basic earnings (loss) per common share (usd per share)	$ 0.29	$ (8.96)	$ 0.06	$ (9.25)
Diluted earnings (loss) per common share (usd per share)	0.29	(8.96)	0.06	(9.25)
Dividends paid per common share (usd per share)	$ 0	$ 0.04	$ 0	$ 0.08
Antidilutive shares excluded from computation of earnings per share		47		46

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Aggregate dividends paid during the period for each share of common stock outstanding.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Number of additional shares included in diluted EPS for potentially dilutive effect of nonvested equity-based payment award containing forfeitable rights to dividends or dividend equivalents, whether paid or unpaid.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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