Property and Equipment

3 Months Ended

Mar. 31, 2018

Property, Plant and Equipment [Abstract]

The following table summarizes our property and equipment as of the dates presented:



	March 31,			December 31,
	2018			2017
Oil and gas properties:
Proved	$	624,747		$	460,029
Unproved	137,722			117,634
Total oil and gas properties	762,469			577,663
Other property and equipment	13,702			12,712
Total properties and equipment	776,171			590,375
Accumulated depreciation, depletion and amortization	(84,888		)	(61,316		)
	$	691,283		$	529,059

Unproved property costs of $137.7 million and $117.6 million have been excluded from amortization as of March 31, 2018 and December 31, 2017, respectively. We transferred less than $0.1 million of undeveloped leasehold costs associated with acreage unlikely to be drilled or associated with proved undeveloped reserves, including capitalized interest, from unproved properties to the full cost pool during the three months ended March 31, 2018. We capitalized internal costs of $0.7 million and $0.6 million and interest of $2.2 million and less than $0.1 million during the three months ended March 31, 2018 and 2017, respectively, in accordance with our accounting policies. Average depreciation, depletion and amortization (“DD&A”) per barrel of oil equivalent of proved oil and gas properties was $15.20 and $11.47 for the three months ended March 31, 2018 and 2017, respectively.