Properties, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2017

Table Text Blocks

Schedule of oil and gas properties

	March 31,		December 31,
(in thousands of dollars)	2017		2016
Mineral interests in properties
Unproved	$	208,913	$	213,153
Proved		1,071,654		1,054,683
Wells and equipment and related facilities		1,440,949		1,395,291
		2,721,516		2,663,127
Less: Accumulated depletion and impairment		(956,569)		(919,539)
Net oil and gas properties	$	1,764,947	$	1,743,588

Schedule of other property, plant and equipment

	March 31,		December 31,
(in thousands of dollars)	2017		2016
Leasehold improvements	$	1,213	$	1,213
Furniture, fixtures, computers and software		4,361		4,170
Vehicles		1,677		1,677
Aircraft		910		910
Other		284		284
		8,445		8,254
Less: Accumulated depreciation and amortization		(5,525)		(5,258)
Net other property, plant and equipment	$	2,920	$	2,996