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Commitments And Contingencies (Tables)
12 Months Ended
Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]  
Total Minimum Commitments From Long-Term Non-Cancelable Operating Leases, Drilling Rig, Seismic And Pipeline Volume Commitments
At December 31, 2012, total minimum commitments from long-term, non-cancelable operating leases, drilling rig, seismic and pipeline volume commitments are as follows:
 
Amount
 
(In thousands)
2013
$
81,548

2014
48,827

2015
27,215

2016
12,170

2017
5,411

2018 and thereafter
15,512

 
$
190,683