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, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Common Share [Abstract]
Net (loss) income	$ (91,996)	$ 5,362	$ (94,828)	$ 9,649
Weighted average shares outstanding	10,263	10,284	10,248	10,272
Denominator for basic earnings per common share	10,263	10,284	10,248	10,272
Employee stock options	0	0	0	1
Other stock compensation plans	0	86	0	112
Dilutive potential common shares	0	86	0	113
Denominator for diluted earnings per common share - adjusted weighted average shares and assumed conversions	10,263	10,370	10,248	10,385
Basic (loss) earnings per common share	$ (8.96)	$ 0.52	$ (9.25)	$ 0.94
Diluted (loss) earnings per common share	(8.96)	0.52	(9.25)	0.93
Dividends paid per common share	$ 0.04	$ 0.04	$ 0.08	$ 0.08
Antidilutive shares excluded from computation of earnings per share	47		46