XML 27 R16.htm IDEA: XBRL DOCUMENT
v3.21.2

Repurchase Agreements | 6 Months Ended
--- | ---
Jun. 30, 2021
Repurchase Agreements [Abstract] |
Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block] | REPURCHASE AGREEMENTS BancShares utilizes securities sold under agreements to repurchase to facilitate the needs of customers and secure wholesale funding needs. Repurchase agreements are transactions whereby BancShares offers to sell to a counterparty an undivided interest in an eligible security at an agreed upon price, and which obligates BancShares to repurchase the security at an agreed upon date, repurchase price, and interest rate. These agreements are recorded at the amount of cash received in connection with the transaction and are reflected as securities sold under customer repurchase agreements. BancShares monitors collateral levels on a continuous basis and maintains records of each transaction specifically describing the applicable security and the counterparty’s interest in that security, and segregates the security from general assets in accordance with regulations governing custodial holdings of securities. The primary risk with repurchase agreements is market risk associated with the investments securing the transactions, as additional collateral may be required based on fair value changes of the underlying investments. Securities pledged as collateral under repurchase agreements are maintained with safekeeping agents. The carrying value of investment securities pledged as collateral under repurchase agreements was $778.4 million and $689.3 million at June 30, 2021 and December 31, 2020, respectively. At June 30, 2021, BancShares held $692.6 million of securities sold under agreements to repurchase, with overnight and continuous remaining contractual maturities, including $544.2 million collateralized by government agency securities and $148.4 million collateralized by commercial mortgage-backed securities. At December 31, 2020, BancShares held securities sold under agreements to repurchase of $641.5 million, with overnight and continuous remaining contractual maturities, including $432.8 million collateralized by government agency securities and $208.7 million collateralized by commercial mortgage-backed securities.

X
- Definition Repurchase Agreements [Abstract] + References No definition available. + Details
Name: | fcnca_RepurchaseAgreementsAbstract
Namespace Prefix: | fcnca_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for repurchase agreements (also known as repos), resale agreements (also known as reverse repurchase agreements or reverse repos), securities borrowed transactions, and securities loaned transactions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -URI http://asc.fasb.org/topic&trid=2197590 + Details
Name: | us-gaap_RepurchaseAgreementsResaleAgreementsSecuritiesBorrowedAndSecuritiesLoanedDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration