Property and Equipment

9 Months Ended

Sep. 30, 2019

Property, Plant and Equipment [Abstract]

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



	September 30,			December 31,
	2019			2018
Oil and gas properties:
Proved	$	1,329,116		$	1,037,993
Unproved	67,865			63,484
Total oil and gas properties	1,396,981			1,101,477
Other property and equipment	25,359			20,383
Total properties and equipment	1,422,340			1,121,860
Accumulated depreciation, depletion and amortization	(323,196		)	(193,866		)
	$	1,099,144		$	927,994

Unproved property costs of $67.9 million and $63.5 million have been excluded from amortization as of September 30, 2019 and December 31, 2018, respectively. An additional $3.5 million and $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 September 30, 2019 and December 31, 2018. We transferred $0.2 million and $11.4 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 nine months ended September 30, 2019 and 2018, respectively. We capitalized internal costs of $3.2 million and $2.4 million and interest of $3.2 million and $7.1 million during the nine months ended September 30, 2019 and 2018, respectively, in accordance with our accounting policies. Average depreciation, depletion and amortization per barrel of oil equivalent of proved oil and gas properties was $17.47 and $15.83 for the nine months ended September 30, 2019 and 2018, respectively.