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 |