Consolidated Condensed Statements of Comprehensive Income (Loss) (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Consolidated Condensed Statements of Comprehensive Income (Loss) (unaudited) [Abstract]
Net (loss) income	$ (2,603)	$ 1,071	$ (5,858)	$ (4,578)
Other comprehensive income:
Change in postretirement benefits transition obligation	1	4	3	4
Total other comprehensive income	1	4	3	4
Comprehensive (loss) income	$ (2,602)	$ 1,075	$ (5,855)	$ (4,574)