Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2018

Property, plant and equipment [abstract]

Reconciliation of the changes in property and equipment assets

The following table reconciles the changes in TransGlobe's property and equipment assets:

($000s)	PNG			Other
Cost	Assets			Assets		Total
Balance at December 31, 2016	$	625,893		$	14,572	$	640,465
Additions	20,301			953		21,254
Changes in estimate for asset retirement obligations	(236		)	—		(236		)
Transfer from exploration and evaluation assets	2,271			—		2,271
Balance at December 31, 2017	648,229			15,525		663,754
Additions	30,832			586		31,418
Changes in estimate for asset retirement obligations	844			—		844
Balance at December 31, 2018	$	679,905		$	16,111	$	696,016

Accumulated depreciation, amortization and impairment losses
Accumulated depletion, depreciation, amortization and impairment        losses at December 31, 2016	$	415,866	$	10,327	$	426,193
Depletion, depreciation and amortization for the year	35,984		1,713		37,697
Accumulated depletion, depreciation, amortization and impairment        losses at December 31, 2017	451,850		12,040		463,890
Depletion, depreciation and amortization for the year	31,422		992		32,414
Balance at December 31, 2018	$	483,272	$	13,032	$	496,304

Foreign Exchange
Balance at December 31, 2016	$	—		$	—	$	—
Currency translation adjustments	4,602			—		4,602
Balance at December 31, 2017	4,602			—		4,602
Currency translation adjustments	(5,972		)	—		(5,972		)
Balance at December 31, 2018	$	(1,370	)	$	—	$	(1,370	)

Net Book Value
At December 31, 2017	$	200,981	$	3,485	$	204,466
At December 31, 2018	$	195,263	$	3,079	$	198,342