Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2013

Commitments and Contingencies [Abstract]

Minimum commitments for unrecorded unconditional purchase obligations [Text Block]

Minimum Commitments.  At December 31, 2013, 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, 2013, were as follows (in thousands):

	Total Minimum Commitments
2014	$	1,777,014
2015 - 2016		1,808,827
2017 - 2018		1,272,578
2019 and beyond		1,176,230
	$	6,034,649