Oil And Gas Properties (Tables)

12 Months Ended

Dec. 31, 2011

Oil And Gas Properties [Abstract]

Capitalized Exploratory Project Costs

		2011		2010
Wang (1)	$	3,096	$	3,095
Danny 2 (1)		2,619		32
Other		125		125
Total	$	5,840	$	3,252

(1)   Amounts primarily reflect pre-engineering costs.  The Wang prospect is located in proximity of our Phoenix field that commenced production in October 2010.  The Danny 2 (formerly  Kathleen) prospect is located within our Bushwood field at Garden Banks Blocks 462, 463, 506 and 507.  Both Wang and Danny 2 are budgeted exploration capital expenditures for 2012.

Changes In Suspended Exploratory Well Costs

		2011		2010			2009
Beginning balance at January 1,	$	3,252	$	3,059		$	2,105
Additions pending the determination of proved reserves		2,513		(944	)		36,208
Reclassifications to proved properties		5		713			(34,622	)
Charged to dry hole expense		70		424			(632	)
Ending balance at December 31,	$	5,840	$	3,252		$	3,059

Components Of Exploration Expenses

		Years Ended December 31,
		2011			2010			2009
Delay rental and geological and geophysical costs	$	2,650		$	2,306		$	3,016
Impairment of unproved properties		8,334			6,394			20,130
Dry hole expense		(70	)		(424	)		1,237
Total exploration expense	$	10,914		$	8,276		$	24,383

Fair Value Of Assets Acquired And Liabilities Assumed

Cash	$	10,156
Deferred tax asset		2,083
Accrued liabilities		(439	)
Asset retirement obligation		(5,841	)
Gain on acquisition of assets	$	5,959