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Oil and Gas Properties (Tables)
 6 Months Ended
Jun. 30, 2016
Oil And Gas Property [Abstract]  
Summary of Oil and Gas Properties

A summary of oil and gas properties follows:

 

 

 

June 30, 2016

(unaudited)

 

 

December 31,

2015

 

 

 

(In thousands)

 

Proved properties and equipment

 

$

592,259

 

 

$

584,692

 

Unproved properties

 

 

73,176

 

 

 

70,298

 

Less accumulated depreciation, depletion, and amortization

 

 

(187,072

)

 

 

(166,890

)

 

 

$

478,363

 

 

$

488,100