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, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Common Share [Abstract]
Net (loss) income	$ (57,422)	$ 9,116	$ (47,773)	$ 19,627
Weighted average shares	10,256	10,239	10,266	10,220
Denominator for basic earnings per common share	10,256	10,239	10,266	10,220
Employee stock options	0	4	0	7
Other stock compensation plans	0	92	0	98
Dilutive potential common shares	0	96	0	105
Denominator for diluted earnings per common share - adjusted weighted average shares and assumed conversions	10,256	10,335	10,266	10,325
Basic (loss) earnings per common share	$ (5.60)	$ 0.89	$ (4.65)	$ 1.92
Diluted (loss) earnings per common share	$ (5.60)	0.88	$ (4.65)	1.90
Antidilutive shares excluded from computation of earnings per share	48		81
Dividends paid per common share	$ 0.04	$ 0.03	$ 0.12	$ 0.09