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Assets Held for Sale (Tables)
12 Months Ended
Dec. 31, 2015
Discontinued Operations and Disposal Groups [Abstract]  
Assets Held-for-sale
The following table presents balance sheet data related to the assets held for sale:
 
December 31, 2015
 
(In thousands)
Assets:
 
Oil and gas properties
$
120,926

Less: accumulated depreciation, depletion, amortization and impairment
94,198

Total assets
$
26,728

Liabilities:
 
Asset retirement obligation
$
(10,228
)
Total liabilities
$
(10,228
)
Net assets
$
16,500