Earnings per Share (Dilution) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net Income (loss) to common shareholders:
Basic	$ (6,910)	$ (34,158)	$ (51,264)	$ (35,718)	$ (45,101)	$ (63,756)	$ (16,110)	$ (8,002)	$ (128,049)	$ (132,969)	$ 54,304
Add effect of:
Preferred dividends									0	0	2,070
Diluted									$ (128,049)	$ (132,969)	$ 56,374
Weighted Average Number of Common Shares Outstanding:
Basic									42,533	35,957	23,252
Add effect of:
Stock compensation grants and warrants									0	0	380
Preferred stock									0	0	5,254
Diluted									42,533	35,957	28,886