Debt and Capital Lease Obligations (Details) (USD $)	Dec. 31, 2012		Dec. 31, 2011		Dec. 23, 2009
Debt Instrument [Line Items]
Total debt including current maturities	$ 355,348,000		$ 354,726,000
Less: current portion	(353,700,000)		(4,543,000)
Total, net	1,648,000	[1]	350,183,000	[1]
Mandatorily redeemable preferred stock	63,200,000		53,200,000
Whitebox Revolving Credit Facility —11.125%
Debt Instrument [Line Items]
Interest rate	11.125%
Total debt including current maturities	50,000,000		50,000,000
Senior Secured Notes, net of discount—9.75%
Debt Instrument [Line Items]
Interest rate	9.75%				9.75%
Total debt including current maturities	297,759,000		296,615,000
Capital lease obligations
Debt Instrument [Line Items]
Total debt including current maturities	4,480,000		5,873,000
Notes payable from vendor financing arrangements
Debt Instrument [Line Items]
Total debt including current maturities	0		166,000
Other
Debt Instrument [Line Items]
Total debt including current maturities	$ 3,109,000	[2]	$ 2,072,000	[2]

[1] Excludes $63.2 million and $53.2 million, respectively, related to the mandatorily redeemable preferred stock. See note 7.

[2] Relates to the short-term project financing described below.