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The amount of ownership percentage in an oil and gas exploration block.

+ References

No definition available.

+ Details

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- Definition

The maximum megawatt power of the gas processing facilities.

+ References

No definition available.

+ Details

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Data Type:	num:powerItemType
Balance Type:	na
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- Definition

Profit sharing as required by the Peruvian tax code, shown as a percentage.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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Period Type:	instant

- Definition

Value-added tax in Peru imposed on goods and services.

+ References

No definition available.

+ Details

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- Definition

The aggregate costs related to construction and development services during the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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- Definition

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

+ References

No definition available.

+ Details

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

- Details

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- Details

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- Details

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Note 22 - Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	46 Months Ended
	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Note 22 - Commitments and Contingencies (Details) [Line Items]
Ownership Percentage, Oil and Gas Exploration Block	100.00%	100.00%
Value-added Tax Rate	18.00%bpz_ValueAddedTaxRate	18.00%bpz_ValueAddedTaxRate
Power Plant [Member]
Note 22 - Commitments and Contingencies (Details) [Line Items]
Plant Capacity (in Megawatts)	135
Long-term Debt [Member] \| Santa Elena Property [Member]
Note 22 - Commitments and Contingencies (Details) [Line Items]
Other Commitment	1.0	1.0
Mining Companies [Member]
Note 22 - Commitments and Contingencies (Details) [Line Items]
Profit Sharing Percentage	8.00%	8.00%
Oil and Gas Companies [Member]
Note 22 - Commitments and Contingencies (Details) [Line Items]
Profit Sharing Percentage	5.00%	5.00%
Santa Elena Property [Member]
Note 22 - Commitments and Contingencies (Details) [Line Items]
Other Commitment	4.8	4.8	4.8
Ownership Percentage, Oil and Gas Exploration Block	10.00%	10.00%	10.00%
Estimated Cost of Gas-to-power Project [Member]
Note 22 - Commitments and Contingencies (Details) [Line Items]
Construction and Development Costs	153.5
Estimated Cost of Power Plant [Member]
Note 22 - Commitments and Contingencies (Details) [Line Items]
Construction and Development Costs	133.5
Estimated Cost of Pipeline Construction [Member]
Note 22 - Commitments and Contingencies (Details) [Line Items]
Construction and Development Costs	20.0