Accrued Liabilities and Other Long-Term Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accrued liabilities
Accrued property, plant and equipment	$ 276,402	$ 87,098
Interest	38,647	27,458
Product and operations	34,165	22,969
Employee compensation	15,356	12,600
Taxes (other than income tax)	10,619	9,914
Other	16,163	11,412
Total accrued liabilities	391,352	171,451
Other long-term liabilities
SMR Liability	89,592	91,851
Deferred revenue	33,139	19,383
Asset retirement obligation	8,548	6,818	4,029
Other	3,061	3,304
Total other long-term liabilities	$ 134,340	$ 121,356