XML 40 R58.htm IDEA: XBRL DOCUMENT ﻿
v2.3.0.11

Commitments and Contingencies (Narrative) (Details) (USD $) | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2011 | Dec. 31, 2010 | Jun. 30, 2010
Commitments and Contingencies |  |  |
Unused commitments | $ 5,801,539 | $ 5,364,451 | $ 5,233,707
Standby letters of credit | 69,969 | 70,755 | 77,681
Recourse period, maximum, in days | 120 |  |
Loans sold with recourse | $ 147,572 | $ 253,347 | $ 200,615

X
- Definition Commitments and Contingencies [Abstract] + Details
Name: | fcnca_CommitmentsAndContingenciesAbstract
Namespace Prefix: | fcnca
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Letters Of Credit Outstanding Amount + Details
Name: | fcnca_LettersOfCreditOutstandingAmount
Namespace Prefix: | fcnca
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Loans Sold With Recourse + Details
Name: | fcnca_LoansSoldWithRecourse
Namespace Prefix: | fcnca
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Recourse Period Maximum + Details
Name: | fcnca_RecoursePeriodMaximum
Namespace Prefix: | fcnca
Data Type: | us-types:periodStringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Unused Commitments + Details
Name: | fcnca_UnusedCommitments
Namespace Prefix: | fcnca
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant