XML 46 R59.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Commitments and Contingencies (Details) (USD $) |  |  |  |  |  |  | 3 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2014 | Dec. 31, 2013 | Mar. 31, 2014 Commitments to Extend Credit | Dec. 31, 2013 Commitments to Extend Credit | Mar. 31, 2014 Standby Letters of Credit | Dec. 31, 2013 Standby Letters of Credit | Mar. 31, 2014 Recourse Obligation on Mortgage Loans Sold | Mar. 31, 2014 Obligation to Repurchase Receivables Sold
Guarantor Obligations [Line Items] |  |  |  |  |  |  |  |
Unused commitments |  |  | $ 6,110,000,000 | $ 5,840,000,000 |  |  |  |
Guarantor obligations amount |  |  |  |  | 52,300,000 | 54,800,000 |  |
Reserve for estimated losses arising from repurchase of loans |  |  |  |  |  |  |  | 3,600,000
FDIC Indemnification Asset | 74,784,000 | 93,397,000 |  |  |  |  |  |
Recourse Period, Maximum1 |  |  |  |  |  |  | 120 days |
FDIC loss share payable | $ 111,339,000 | $ 109,378,000 |  |  |  |  |  |

X
- Definition Payable to FDIC for Loss Share Agreements + References No definition available. + Details
Name: | fcnca_PayableToFdicForLossShareAgreements
Namespace Prefix: | fcnca_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Recourse Period Maximum1 + References No definition available. + Details
Name: | fcnca_RecoursePeriodMaximum1
Namespace Prefix: | fcnca_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Unused Commitments + References No definition available. + Details
Name: | fcnca_UnusedCommitments
Namespace Prefix: | fcnca_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying amount of receivable assets originating from the indemnification agreement with the Federal Deposit Insurance Corporation (FDIC), in which the FDIC is to partially cover losses. + References No definition available. + Details
Name: | us-gaap_FDICIndemnificationAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_GuaranteeObligationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
Name: | us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant