Property and Equipment

3 Months Ended

Mar. 31, 2019

Property, Plant and Equipment [Abstract]

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



	March 31,			December 31,
	2019			2018
Oil and gas properties:
Proved	$	1,135,580		$	1,037,993
Unproved	64,429			63,484
Total oil and gas properties	1,200,009			1,101,477
Other property and equipment	22,502			20,383
Total properties and equipment	1,222,511			1,121,860
Accumulated depreciation, depletion and amortization	(232,681		)	(193,866		)
	$	989,830		$	927,994

Unproved property costs of $64.4 million and $63.5 million have been excluded from amortization as of March 31, 2019 and December 31, 2018, respectively. An additional $0.3 million of costs, associated with wells in-progress for which we had not previously recognized any proved undeveloped reserves, were excluded from amortization as of March 31, 2019 and December 31, 2018. We transferred less than $0.1 million and $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, 2019 and 2018, respectively. We capitalized internal costs of $1.0 million and $0.7 million and interest of $1.2 million and $2.2 million during the three months ended March 31, 2019 and 2018, 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 $17.49 and $15.20 for the three months ended March 31, 2019 and 2018, respectively.