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Summary of Significant Accounting Policies (Summary of Gas and Oil Properties) (Details) - USD ($)	Jun. 30, 2015	Dec. 31, 2014
Property Plant And Equipment [Line Items]
Total natural gas and oil properties	$ 42,580,600	$ 42,580,600
Accumulated depletion and impairment	(40,466,900)	(40,422,800)
Gas and oil properties, net	2,113,700	2,157,800
Leasehold interests
Property Plant And Equipment [Line Items]
Total natural gas and oil properties	898,600	898,600
Wells and related equipment
Property Plant And Equipment [Line Items]
Total natural gas and oil properties	$ 41,682,000	$ 41,682,000

Amount of accumulated depreciation, depletion, amortization and impairment of oil and gas property carried under the successful effort method.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 235

-Section 50

-Paragraph 13

-URI http://asc.fasb.org/extlink&oid=51678428&loc=d3e61901-109447

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-10(b))

-URI http://asc.fasb.org/extlink&oid=50486907&loc=d3e511914-122862

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- Definition

Oil and gas properties net of accumulated depreciation, depletion, amortization, impairment, and abandonment, carried under the successful effort method.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 235

-Section 50

-Paragraph 13

-URI http://asc.fasb.org/extlink&oid=51678428&loc=d3e61901-109447

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-10.(b))

-URI http://asc.fasb.org/extlink&oid=50486907&loc=d3e511914-122862

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+ References

No definition available.

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- Definition

Oil and Gas properties with proved reserves under the successful effort method.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 360

-Glossary Proved Properties

-URI http://asc.fasb.org/extlink&oid=6522428

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 360

-Section 25

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=56951519&loc=d3e64746-109465

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ATLAS AMERICA SERIES 25-2004 (B) L.P. 10-Q