Segment Information Measurement of Segment Income (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Transaction costs	$ 1,034,000	$ 0	$ 2,871,000	$ 0
Loss on sale of assets, net	189,000	809,000	189,000	809,000
Restructuring costs	0	(2,426,000)	0	(2,728,000)
Loss on asset impairment	0	317,091,000	0	317,091,000
Consolidated income before income taxes and discontinued operations	6,921,000	(305,172,000)	14,842,000	(269,596,000)
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Transaction costs	1,034,000	0	2,871,000	0
Loss on sale of assets, net	189,000	809,000	189,000	809,000
Restructuring costs	0	2,426,000	0	2,728,000
Loss on asset impairment	0	317,091,000	0	317,091,000
Consolidated income before income taxes and discontinued operations	$ 8,144,000	$ 15,154,000	$ 17,902,000	$ 51,032,000