Name:	crzo_CostToIncreaseOwnershipPercentage
Namespace Prefix:	crzo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Initial ownership percentage in the joint interest properties of the joint venture partner.

No definition available.

Name:	crzo_InitialOwnershipInterestOfPartner
Namespace Prefix:	crzo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The percentage of net proceeds of the joint venture that the Company has ownership of.

No definition available.

Name:	crzo_JointVentureInvestmentNetProceedsOwnershipPercentage
Namespace Prefix:	crzo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The percentage of net proceeds of the Joint Venture that the Company has ownership of under the original terms of the agreement.

No definition available.

Name:	crzo_JointVentureInvestmentOriginalOwnershipPercentage
Namespace Prefix:	crzo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Joint Venture, Percentage of Ownership Increase (Decrease)

No definition available.

Name:	crzo_JointVenturePercentageOfOwnershipIncreaseDecrease
Namespace Prefix:	crzo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The cash outflow associated with the investment in or advances to an entity in which the reporting entity shares control of the entity with another party or group.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3213-108585

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 17

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.