Represents the maximum amount of the given debt instrument the Company may redeem before the given date.

No definition available.

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Namespace Prefix:	bry_
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Period Type:	duration

- Definition

Represents the percentage of principal or face amount of the given debt instrument that the Company would pay, in addition to accrued and unpaid interest and a "make whole" premium, in order to redeem the given debt instrument in whole or in part.

+ References

No definition available.

+ Details

Name:	bry_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountPlusMakeWholePremiumAndAccruedAndUnpaidInterest
Namespace Prefix:	bry_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the redemption price, as a percentage of the principal or face amount of the given debt instrument, that the Company must pay upon redemption before the given date.

+ References

No definition available.

+ Details

Name:	bry_SeniorNotesRedemptionPricePercentageOfPrincipal
Namespace Prefix:	bry_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Interest rate stated in the contractual debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

+ References

No definition available.

+ Details

Name:	us-gaap_ProceedsFromDebtNetOfIssuanceCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16(a))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_SeniorNotes
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Debt (6.75% Senior Notes Due 2020) (Details) (6.75% Senior notes due 2020, USD $)	0 Months Ended	12 Months Ended
	Nov. 01, 2010	Dec. 31, 2012	Dec. 31, 2011
Debt Instrument
Interest rate on debt instrument (as a percent)		6.75%
Senior Notes	$ 300,000,000	$ 300,000,000	$ 300,000,000
Net proceeds from Issuance long-term debt	$ 294,000,000
Debt Instrument redemption price percentage of principal amount plus make whole premium and accrued and unpaid interest		100.00%
Prior to November 1, 2013
Debt Instrument
Debt Instrument Redemption Percentage, Maximum		35.00%
Senior notes redemption price percentage of principal		106.75%
November 1, 2015 Through October 31, 2016
Debt Instrument
Senior notes redemption price percentage of principal		103.375%
November 1, 2016 through October 31, 2017
Debt Instrument
Senior notes redemption price percentage of principal		102.25%
November 1, 2017 through October 31, 2018
Debt Instrument
Senior notes redemption price percentage of principal		101.125%
November 1, 2018 and thereafter
Debt Instrument
Senior notes redemption price percentage of principal		100.00%