Represents the amount of penalty, for each well, that is not required to be paid as a result of amendment to certain contractual obligations.

Name:	bry_ContractualObligationAmountPenaltyWaivedPerWell
Namespace Prefix:	bry
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the obligation of the entity to pay for costs incurred by the third party in connection with the construction.

+ Details

Name:	bry_ContractualObligationCostsIncurredForConstruction
Namespace Prefix:	bry
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the expenditure that is required to be made by the entity.

+ Details

Name:	bry_ContractualObligationCumulativeContingentExpenditure
Namespace Prefix:	bry
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the penalty as a percentage of difference between the specified amount and the actual amount expended.

+ Details

Name:	bry_ContractualObligationPenaltyAsPercentageOfDifferenceBetweenSpecifiedAmountAndActualExpended
Namespace Prefix:	bry
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the specified amount for penalty calculation.

+ Details

Name:	bry_ContractualObligationSpecifiedAmountForPenaltyCalculation
Namespace Prefix:	bry
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the expenditure that is otherwise required to be made by the third party.

+ Details

Name:	bry_ContractualObligationThirdPartyContingentExpenditure
Namespace Prefix:	bry
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the expenses agreed to be incurred by the entity which are directly related and attributable to settlement of litigation.

+ Details

Name:	bry_LitigationSettlementExpensesToBeIncurred
Namespace Prefix:	bry
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This element represents the funding agreed to be made by the entity to mutually acceptable public project which are directly related and attributable to settlement of litigation.

+ Details

Name:	bry_LitigationSettlementFundingToMutuallyAcceptablePublicProject
Namespace Prefix:	bry
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This element represents the expenses incurred by the entity which are directly related and attributable to receiving an award in settlement of litigation.

+ Details

Name:	us-gaap_LitigationSettlementExpense
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ Details

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The estimated maximum amount of possible loss from the contingency.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14557-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 14
-Paragraph 3
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14435-108349

+ Details

Name:	us-gaap_LossContingencyRangeOfPossibleLossMaximum
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Commitments and Contingencies (Details 2) (USD $)		1 Months Ended		1 Months Ended
Commitments and Contingencies (Details 2) (USD $)	Jan. 31, 2011 Carry and Earning Agreement	Apr. 30, 2011 Bureau of Land Management	Jun. 30, 2011 Royalty payment disputes	Jun. 30, 2011 Order of Violation from Colorado Oil and Gas Conservative Commission
Commitments
Amount of penalty waived for each well not spud	$ 200,000
Obligation to pay a third party in connection with the construction	4,500,000
Cumulative contingent expenditure	9,000,000
Contingent expenditure payable by third party	4,500,000
Penalty payable as a percentage of difference between specified amount and actual expended (as a percent)	50.00%
Specified amount for penalty calculation	12,000,000
Litigation Settlement Expenses to be Incurred				100,000
Litigation Settlement Funding to Mutually Acceptable Public Project				73,000
Civil penalty paid		2,100,000
Disputed amounts required to be paid			$ 7,000,000