v2.4.0.6

Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2012
Notes To Financial Statements [Abstract] |
Minimum commitments for unrecorded unconditional purchase obligations [Text Block] | Minimum Commitments. At December 31, 2012, total minimum commitments from long-term non-cancelable operating leases, drilling rig commitments, seismic purchase obligations, fracturing services obligations, other purchase obligations and transportation and storage service commitments, based on current transportation and storage rates and the foreign currency exchange rates used to convert Canadian dollars and British pounds into United States dollars at December 31, 2012, were as follows (in thousands):
|  | Total Minimum
|  | Commitments
2013 | $ | 2,194,728
2014 - 2015 |  | 1,517,994
2016 - 2017 |  | 1,205,897
2018 and beyond |  | 1,369,924
| $ | 6,288,543

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