XML 70 R94.htm IDEA: XBRL DOCUMENT v2.4.0.6
Financial Instruments (Details 3)
12 Months Ended
Dec. 31, 2012
Collar Hedges Contract One [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Dec. 08, 2010
Commencement Date Jan. 01, 2011
Termination Date Dec. 31, 2012
Transaction Hedged OCC
Notional Amount (in short tons per month) 2,000
Floor Strike Price Per Short Ton (in dollars per short ton) 80.00
Cap Strike Price Per Short Ton (in dollars per short ton) 180.00
Collar Hedges Contract Two [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Dec. 08, 2010
Commencement Date Jan. 01, 2011
Termination Date Dec. 31, 2012
Transaction Hedged OCC
Notional Amount (in short tons per month) 2,000
Floor Strike Price Per Short Ton (in dollars per short ton) 86.00
Cap Strike Price Per Short Ton (in dollars per short ton) 210.00
Collar Hedges Contract Three [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Dec. 08, 2010
Commencement Date Jan. 01, 2011
Termination Date Dec. 31, 2012
Transaction Hedged OCC
Notional Amount (in short tons per month) 2,000
Floor Strike Price Per Short Ton (in dollars per short ton) 81.00
Cap Strike Price Per Short Ton (in dollars per short ton) 190.00
Collar Hedges Contract Four [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Dec. 08, 2010
Commencement Date Jan. 01, 2011
Termination Date Dec. 31, 2012
Transaction Hedged OCC
Notional Amount (in short tons per month) 2,000
Floor Strike Price Per Short Ton (in dollars per short ton) 85.00
Cap Strike Price Per Short Ton (in dollars per short ton) 195.00
Collar Hedges Contract Five [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Dec. 08, 2010
Commencement Date Jan. 01, 2011
Termination Date Dec. 31, 2012
Transaction Hedged OCC
Notional Amount (in short tons per month) 2,000
Floor Strike Price Per Short Ton (in dollars per short ton) 87.00
Cap Strike Price Per Short Ton (in dollars per short ton) 195.00
Collar Hedges Contract Six [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Jan. 19, 2011
Commencement Date Feb. 01, 2011
Termination Date Dec. 31, 2012
Transaction Hedged OCC
Notional Amount (in short tons per month) 2,500
Floor Strike Price Per Short Ton (in dollars per short ton) 90.00
Cap Strike Price Per Short Ton (in dollars per short ton) 155.00
Collar Hedges Contract Seven [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Jan. 19, 2011
Commencement Date Feb. 01, 2011
Termination Date Dec. 31, 2012
Transaction Hedged OCC
Notional Amount (in short tons per month) 2,500
Floor Strike Price Per Short Ton (in dollars per short ton) 90.00
Cap Strike Price Per Short Ton (in dollars per short ton) 155.00
Collar Hedges Contract Eight [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Apr. 15, 2011
Commencement Date Jul. 01, 2011
Termination Date Dec. 31, 2012
Transaction Hedged OCC
Notional Amount (in short tons per month) 2,000
Floor Strike Price Per Short Ton (in dollars per short ton) 90.00
Cap Strike Price Per Short Ton (in dollars per short ton) 155.00
Collar Hedges Contract Nine [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Apr. 15, 2011
Commencement Date Jul. 01, 2011
Termination Date Dec. 31, 2012
Transaction Hedged OCC
Notional Amount (in short tons per month) 2,000
Floor Strike Price Per Short Ton (in dollars per short ton) 90.00
Cap Strike Price Per Short Ton (in dollars per short ton) 155.00
Collar Hedges Contract Ten [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Apr. 26, 2011
Commencement Date Jul. 01, 2011
Termination Date Dec. 31, 2012
Transaction Hedged ONP
Notional Amount (in short tons per month) 1,000
Floor Strike Price Per Short Ton (in dollars per short ton) 90.00
Cap Strike Price Per Short Ton (in dollars per short ton) 165.00
Collar Hedges Contract Eleven [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Apr. 26, 2011
Commencement Date Jul. 01, 2011
Termination Date Dec. 31, 2012
Transaction Hedged ONP
Notional Amount (in short tons per month) 1,000
Floor Strike Price Per Short Ton (in dollars per short ton) 90.00
Cap Strike Price Per Short Ton (in dollars per short ton) 165.00
Collar Hedges Contract Twelve [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Aug. 01, 2011
Commencement Date Jan. 01, 2012
Termination Date Dec. 31, 2012
Transaction Hedged ONP
Notional Amount (in short tons per month) 2,000
Floor Strike Price Per Short Ton (in dollars per short ton) 85.00
Cap Strike Price Per Short Ton (in dollars per short ton) 135.00
Collar Hedges Contract Thirteen [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Aug. 01, 2011
Commencement Date Jan. 01, 2012
Termination Date Dec. 31, 2012
Transaction Hedged ONP
Notional Amount (in short tons per month) 2,000
Floor Strike Price Per Short Ton (in dollars per short ton) 85.00
Cap Strike Price Per Short Ton (in dollars per short ton) 135.00
Collar Hedges Contract Fourteen [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Jan. 11, 2012
Commencement Date Feb. 01, 2012
Termination Date Dec. 31, 2012
Transaction Hedged OCC
Notional Amount (in short tons per month) 1,000
Floor Strike Price Per Short Ton (in dollars per short ton) 85.00
Cap Strike Price Per Short Ton (in dollars per short ton) 135.00
Collar Hedges Contract Fifteen [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Jan. 11, 2012
Commencement Date Feb. 01, 2012
Termination Date Dec. 31, 2012
Transaction Hedged OCC
Notional Amount (in short tons per month) 1,000
Floor Strike Price Per Short Ton (in dollars per short ton) 85.00
Cap Strike Price Per Short Ton (in dollars per short ton) 135.00
Collar Hedges Contract Sixteen [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Jan. 11, 2012
Commencement Date Feb. 01, 2012
Termination Date Dec. 31, 2012
Transaction Hedged OCC
Notional Amount (in short tons per month) 1,000
Floor Strike Price Per Short Ton (in dollars per short ton) 80.00
Cap Strike Price Per Short Ton (in dollars per short ton) 125.00
Collar Hedges Contract Seventeen [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Jan. 31, 2012
Commencement Date Apr. 01, 2012
Termination Date Mar. 31, 2013
Transaction Hedged OCC
Notional Amount (in short tons per month) 2,000
Floor Strike Price Per Short Ton (in dollars per short ton) 85.00
Cap Strike Price Per Short Ton (in dollars per short ton) 136.00
Collar Hedges Contract Eighteen [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Jan. 31, 2012
Commencement Date Apr. 01, 2012
Termination Date Mar. 31, 2013
Transaction Hedged OCC
Notional Amount (in short tons per month) 2,000
Floor Strike Price Per Short Ton (in dollars per short ton) 85.00
Cap Strike Price Per Short Ton (in dollars per short ton) 165.00
Collar Hedges Contract Nineteen [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Jan. 31, 2012
Commencement Date Apr. 01, 2012
Termination Date Mar. 31, 2013
Transaction Hedged OCC
Notional Amount (in short tons per month) 2,000
Floor Strike Price Per Short Ton (in dollars per short ton) 85.00
Cap Strike Price Per Short Ton (in dollars per short ton) 156.00
Collar Hedges Contract Twenty [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Jan. 31, 2012
Commencement Date Apr. 01, 2012
Termination Date Mar. 31, 2013
Transaction Hedged ONP
Notional Amount (in short tons per month) 2,000
Floor Strike Price Per Short Ton (in dollars per short ton) 80.00
Cap Strike Price Per Short Ton (in dollars per short ton) 106.00
Collar Hedges Contract Twenty-One [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Jan. 31, 2012
Commencement Date Apr. 01, 2012
Termination Date Mar. 31, 2013
Transaction Hedged ONP
Notional Amount (in short tons per month) 2,000
Floor Strike Price Per Short Ton (in dollars per short ton) 80.00
Cap Strike Price Per Short Ton (in dollars per short ton) 110.00
Collar Hedges Contract Twenty-Two [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Jan. 31, 2012
Commencement Date Apr. 01, 2012
Termination Date Mar. 31, 2013
Transaction Hedged ONP
Notional Amount (in short tons per month) 2,000
Floor Strike Price Per Short Ton (in dollars per short ton) 80.00
Cap Strike Price Per Short Ton (in dollars per short ton) 110.00
Collar Hedges Contract Twenty-Three [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Jun. 07, 2012
Commencement Date Jan. 01, 2013
Termination Date Dec. 31, 2013
Transaction Hedged OCC
Notional Amount (in short tons per month) 2,000
Floor Strike Price Per Short Ton (in dollars per short ton) 90.00
Cap Strike Price Per Short Ton (in dollars per short ton) 138.00
Collar Hedges Contract Twenty-Four [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Jun. 07, 2012
Commencement Date Jan. 01, 2013
Termination Date Dec. 31, 2013
Transaction Hedged OCC
Notional Amount (in short tons per month) 2,000
Floor Strike Price Per Short Ton (in dollars per short ton) 95.00
Cap Strike Price Per Short Ton (in dollars per short ton) 140.00
Collar Hedges Contract Twenty-Five [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Jun. 07, 2012
Commencement Date Jan. 01, 2013
Termination Date Dec. 31, 2013
Transaction Hedged OCC
Notional Amount (in short tons per month) 2,000
Floor Strike Price Per Short Ton (in dollars per short ton) 95.00
Cap Strike Price Per Short Ton (in dollars per short ton) 148.00
Collar Hedges Contract Twenty-Six [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Aug. 21, 2012
Commencement Date Jan. 01, 2013
Termination Date Dec. 31, 2013
Transaction Hedged OCC
Notional Amount (in short tons per month) 2,500
Floor Strike Price Per Short Ton (in dollars per short ton) 80.00
Cap Strike Price Per Short Ton (in dollars per short ton) 128.00
Collar Hedges Contract Twenty-Seven [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Aug. 21, 2012
Commencement Date Jan. 01, 2013
Termination Date Dec. 31, 2013
Transaction Hedged OCC
Notional Amount (in short tons per month) 2,500
Floor Strike Price Per Short Ton (in dollars per short ton) 80.00
Cap Strike Price Per Short Ton (in dollars per short ton) 128.00
Collar Hedges Contract Twenty-Eight [Member]
 
Summary of costless collar hedges outstanding  
Inception Date Aug. 21, 2012
Commencement Date Jan. 01, 2013
Termination Date Dec. 31, 2013
Transaction Hedged OCC
Notional Amount (in short tons per month) 2,500
Floor Strike Price Per Short Ton (in dollars per short ton) 75.00
Cap Strike Price Per Short Ton (in dollars per short ton) 123.00