Summary of Significant Accounting Policies Allowance for Loan Losses (Details) (USD $)	12 Months Ended
Dec. 31, 2010	Dec. 31, 2012
Allowance for Loan Losses [Abstract]
Loan Balance Threshold to Determine Whether Loan is Individually Evaluated for Impairment		$ 375,000
Net change in the provision and allowance for loan losses due to methodolgy changes in the provision for loan losses	$ 1,200,000

Represent the net dollar change in the provision and allowance for loan losses due to methodolgy changes in the provision for loan losses.

No definition available.

Name:	citz_NetChangeInProvisionAndAllowanceForLoanLossesDueToMethodolgyChangesInProvisionForLoanLosses
Namespace Prefix:	citz_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration