Summary of Significant Accounting Policies Financial Statements (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Statutory deposit with state insurance departments	$ 9.8	$ 10.0

The fair value of the asset transferred to a third party to serve as a deposit, which typically serves as a security against failure by the transferor to continue operations, as required by state regulators.

No definition available.

Name:	cia_StatutoryDepositWithStateInsuranceDepartments
Namespace Prefix:	cia_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant