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Commitments and Contingencies (Details 2) (USD $)
 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Aug. 31, 2010
City
CRNF
Aug. 31, 2008
City
CRNF
Aug. 31, 2010
City
Lawsuit under long-term purchase agreement
CRNF
Dec. 15, 2011
Throughput and deficiency agreement assumed
Wynnewood Acquisition
Dec. 31, 2011
Material
Plains Pipeline
CRRM
year
barrelperday
Dec. 31, 2010
Material
Plains Pipeline
CRRM
Dec. 31, 2009
Material
Plains Pipeline
CRRM
Dec. 31, 2011
Material
MAPL
CRRM
Dec. 31, 2010
Material
MAPL
CRRM
Dec. 31, 2009
Material
MAPL
CRRM
Dec. 31, 2005
Material
MAPL
CRRM
barrelperyear
Dec. 31, 2011
Material
CCPS
CRRM
Dec. 31, 2010
Material
CCPS
CRRM
Dec. 31, 2009
Material
CCPS
CRRM
Dec. 31, 2004
Material
CCPS
CRRM
barrelperday
Dec. 31, 2011
Material
Plains
CRRM
Dec. 31, 2010
Material
Plains
CRRM
Dec. 31, 2009
Material
Plains
CRRM
Dec. 31, 2007
Material
Plains
CRRM
barrelperyear
year
Dec. 31, 2011
Material
Linde, Inc.
CRNF
Dec. 31, 2010
Material
Linde, Inc.
CRNF
Dec. 31, 2009
Material
Linde, Inc.
CRNF
Dec. 31, 2005
Material
Linde, Inc.
CRNF
Dec. 31, 2011
Material
Enterprise
CRRM
year
Dec. 31, 2010
Material
Enterprise
CRRM
Dec. 31, 2009
Material
Enterprise
CRRM
Oct. 31, 2008
Material
Magellan
barrelperday
year
Dec. 31, 2011
Material
Magellan
Dec. 31, 2010
Material
Magellan
Dec. 31, 2009
Material
Magellan
May 31, 2009
Equipment and Materials
Cominco Fertilizer Partnership
CRNF
Nov. 30, 2007
Equipment and Materials
Cominco Fertilizer Partnership
CRNF
Dec. 31, 2011
Equipment and Materials
Cominco Fertilizer Partnership
CRNF
Long-term commitments                                                                        
Receipt of refunds           $ 4,800,000                                                            
Minimum committed contractual payment       1,900,000                                           300,000               4,300,000 3,500,000  
Estimated remaining obligation         14,900,000                                                              
Minimum barrels of crude oil to be transported per day               80,000           2,000,000       10,000       29,200,000               20,000            
Term of agreement (in years)               5                                     5     10            
Term of agreement over which a quantity of materials must be purchased to meet the capacity of the supplier (in years)               15                                                        
Expenses related to agreement               9,800,000 11,400,000 11,000,000 1,300,000 2,400,000 2,400,000   8,400,000 16,600,000 9,700,000   2,400,000 2,500,000 2,600,000   4,200,000 4,700,000 4,100,000   1,800,000 1,300,000 1,300,000   700,000 600,000 60,000      
Annual automatic extension period of agreement (in years)                                           1                            
Period after which agreement is subject to annual automatic extensions                                           2 years 1 day                            
Expenses related to separate Terminalling Agreement                                     3,300,000 3,100,000 3,500,000                              
Amount paid under agreement 91,224,000 32,409,000 48,773,000                                                             2,300,000    
Amount accrued for dismantling and removal of unit                                                                       2,900,000
Amount accrued related to nitric acid plant and dismantling obligation                                                                       4,900,000
Estimated annual expenses associated with agreement             $ 4,000,000