Schedule II - Valuation And Qualifying Accounts

12 Months Ended

Dec. 31, 2011

Schedule II - Valuation And Qualifying Accounts [Abstract]

Schedule II - Valuation And Qualifying Accounts

ATP OIL & GAS CORPORATION AND SUBSIDIARIES

SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS

FOR EACH OF THE THREE YEARS ENDED DECEMBER 31, 2011

(In Thousands)

	Balance at Beginning of Period		Charged to Costs and Expenses		Charged to Other Accounts			Deduction			Balance at End of Period
2009
Allowance for doubtful accounts	$	352	$	86	$	—		$	(147	)	$	291
Valuation allowance on deferred tax assets		3,025		1,300		—			—			4,325
2010
Allowance for doubtful accounts		291		—		—			(66	)		225
Valuation allowance on deferred tax assets		4,325		94,835		(99	)		—			99,061
2011
Allowance for doubtful accounts		225		—		—			—			225
Valuation allowance on deferred tax assets		99,061		62,118		(319	)		—			160,860