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		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Numerator for basic and diluted earnings (loss) per common share:
Net income (loss)	$ 3,222	$ (5,982)	$ 3,824	$ (100,810)
Denominator:
Weighted average shares outstanding (shares)	10,341	10,296	10,332	10,264
Denominator for basic earnings per common share (shares)	10,341	10,296	10,332	10,264
Effect of dilutive securities:
Other stock compensation plans (shares)	138	0	103	0
Dilutive potential common shares (shares)	138	0	103	0
Denominator for diluted earnings per common share - adjusted weighted average shares outstanding and assumed conversions (shares)	10,479	10,296	10,435	10,264
Basic earnings (loss) per common share (usd per share)	$ 0.31	$ (0.58)	$ 0.37	$ (9.82)
Diluted earnings (loss) per common share (usd per share)	0.31	(0.58)	0.37	(9.82)
Dividends paid per common share (usd per share)	$ 0	$ 0.04	$ 0	$ 0.12
Antidilutive shares excluded from computation of earnings per share		34		80