Contractual Obligations (Tables)

3 Months Ended

Mar. 31, 2013

Contractual Obligations

Summary of components of short-term and long-term contractual obligations

	March 31, 2013		December 31, 2012
	($ in thousands)
Short-term Contractual Obligations:
Social obligation payments for Block 9, offshore Angola	$	150	$	150
Social obligation payments for Block 21, offshore Angola		300		300
Social obligation and bonus payments for Block 20, offshore Angola(1)		48,569		48,569
	$	49,019	$	49,019
Long-term Contractual Obligations:
Social obligation payments for Block 9, offshore Angola	$	848	$	848
Social obligation payments for Block 21, offshore Angola		1,684		1,684
Social obligation and bonus payments for Block 20, offshore Angola(1)		122,851		165,706
	$	125,383	$	168,238

(1)

The total amount of social obligation payments for Block 20 has been capitalized. See Note 7—Property, Plant, and Equipment.