SMR Transaction (Details) (USD $)	0 Months Ended
	Sep. 02, 2009	Dec. 31, 2013	Dec. 31, 2012
ASSETS
Property, plant and equipment, net of accumulated depreciation of $20,195 and $14,926, respectively		$ 7,693,169,000	$ 4,939,618,000
Accumulated depreciation		890,598,000	602,698,000
LIABILITIES
Accrued liabilities		437,847,000	390,178,000
Other long-term liabilities		156,500,000	134,261,000
SMR Transaction
Divestitures
Proceeds from SMR Transaction	73,100,000
Imputed interest rate on SMR liability (as a percent)		9.35%
ASSETS
Property, plant and equipment, net of accumulated depreciation of $20,195 and $14,926, respectively		85,169,000	90,437,000
Accumulated depreciation		20,195,000	14,926,000
LIABILITIES
Accrued liabilities		2,479,000	2,259,000
Other long-term liabilities		$ 87,113,000	$ 89,592,000