Condensed Consolidating Financial Information (Narrative) (Details)	Mar. 31, 2014
Condensed Consolidating Financial Information [Line Items]
Voting interest of the subsidiary owned by the registrant	100.00%

The percentage of voting interest of the subsidiary owned by the registrant.

No definition available.

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