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Allowance for Credit Losses (Summary of Activity In Allowance for Loan and Lease Losses) (Details) - USD ($) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Jan. 01, 2020
Receivables [Abstract] |  |  |  |  |  |
Expected credit losses on SBA-PPP loans |  |  |  |  | $ 0 |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance | $ 223,936,000 | $ 226,825,000 | $ 225,141,000 | $ 226,825,000 | 223,936,000 |
Decrease in allowance due to COVID-19 |  |  | $ 36,100,000 |  |  |
Forecast period (years) |  |  | 2 years |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 222,450,000 | 226,583,000 | $ 225,141,000 | 223,712,000 |  |
Provision (credits) | 4,042,000 | 6,766,000 | 52,949,000 | 23,714,000 |  |
Initial PCD allowance |  |  | 1,193,000 |  |  |
Charge-offs | (8,932,000) | (9,647,000) | (35,257,000) | (30,403,000) |  |
Recoveries | 6,376,000 | 3,123,000 | 17,834,000 | 9,802,000 |  |
Ending balance | 223,936,000 | 226,825,000 | 223,936,000 | 226,825,000 |  |
Adoption of ASC 326 |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | (37,924,000) |  |  | $ (37,900,000)
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | (37,924,000) |  |  |
Adjusted Balance |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 187,217,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 187,217,000 |  |  |
Commercial | Construction and land development |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance | 7,290,000 | 32,088,000 | 7,290,000 | 35,270,000 | 7,290,000 |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 6,906,000 | 31,944,000 | 33,213,000 | 35,270,000 |  |
Provision (credits) | 120,000 | 208,000 | 4,876,000 | (3,217,000) |  |
Initial PCD allowance |  |  | 0 |  |  |
Charge-offs | 0 | (116,000) | (138,000) | (188,000) |  |
Recoveries | 264,000 | 52,000 | 400,000 | 223,000 |  |
Ending balance | 7,290,000 | 32,088,000 | 7,290,000 | 32,088,000 |  |
Commercial | Construction and land development | Adoption of ASC 326 |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | (31,061,000) |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | (31,061,000) |  |  |
Commercial | Construction and land development | Adjusted Balance |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 2,152,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 2,152,000 |  |  |
Commercial | Owner occupied commercial mortgage |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance | 23,092,000 |  | 23,092,000 |  | 23,092,000 |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 22,489,000 |  | 36,444,000 |  |  |
Provision (credits) | 625,000 |  | 6,011,000 |  |  |
Initial PCD allowance |  |  | 0 |  |  |
Charge-offs | (87,000) |  | (407,000) |  |  |
Recoveries | 65,000 |  | 360,000 |  |  |
Ending balance | 23,092,000 |  | 23,092,000 |  |  |
Commercial | Owner occupied commercial mortgage | Adoption of ASC 326 |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | (19,316,000) |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | (19,316,000) |  |  |
Commercial | Owner occupied commercial mortgage | Adjusted Balance |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 17,128,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 17,128,000 |  |  |
Commercial | Non-owner occupied commercial mortgage |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance | 22,826,000 |  | 22,826,000 |  | 22,826,000 |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 22,149,000 |  | 11,102,000 |  |  |
Provision (credits) | 667,000 |  | 11,165,000 |  |  |
Initial PCD allowance |  |  | 0 |  |  |
Charge-offs | 0 |  | (8,000) |  |  |
Recoveries | 10,000 |  | 107,000 |  |  |
Ending balance | 22,826,000 |  | 22,826,000 |  |  |
Commercial | Non-owner occupied commercial mortgage | Adoption of ASC 326 |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 460,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 460,000 |  |  |
Commercial | Non-owner occupied commercial mortgage | Adjusted Balance |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 11,562,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 11,562,000 |  |  |
Commercial | Commercial and industrial |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance | 26,772,000 | 59,179,000 | 26,772,000 | 59,179,000 | 26,772,000 |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 24,633,000 | 56,901,000 | 61,610,000 | 55,620,000 |  |
Provision (credits) | 3,381,000 | 4,714,000 | 10,802,000 | 10,138,000 |  |
Initial PCD allowance |  |  | 0 |  |  |
Charge-offs | (3,241,000) | (3,047,000) | (12,159,000) | (8,327,000) |  |
Recoveries | 1,999,000 | 611,000 | 4,156,000 | 1,748,000 |  |
Ending balance | 26,772,000 | 59,179,000 | 26,772,000 | 59,179,000 |  |
Commercial | Commercial and industrial | Adoption of ASC 326 |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | (37,637,000) |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | (37,637,000) |  |  |
Commercial | Commercial and industrial | Adjusted Balance |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 23,973,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 23,973,000 |  |  |
Commercial | Other |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  | 2,215,000 |  | 2,215,000 |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  | 2,183,000 |  | 2,221,000 |  |
Provision (credits) |  | 54,000 |  | (618,000) |  |
Charge-offs |  | (42,000) |  | (73,000) |  |
Recoveries |  | 20,000 |  | 685,000 |  |
Ending balance |  | 2,215,000 |  | 2,215,000 |  |
Commercial | Mortgage |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  | 47,850,000 |  | 43,451,000 |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  | 48,962,000 |  | 43,451,000 |  |
Provision (credits) |  | (1,337,000) |  | 4,748,000 |  |
Charge-offs |  | (1,000) |  | (851,000) |  |
Recoveries |  | 226,000 |  | 502,000 |  |
Ending balance |  | 47,850,000 |  | 47,850,000 |  |
Commercial | Other commercial real estate |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  | 2,252,000 |  | 2,481,000 |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  | 2,342,000 |  | 2,481,000 |  |
Provision (credits) |  | (90,000) |  | (230,000) |  |
Charge-offs |  | 0 |  | 0 |  |
Recoveries |  | 0 |  | 1,000 |  |
Ending balance |  | 2,252,000 |  | 2,252,000 |  |
Consumer | Construction and land development |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance | 1,609,000 | 2,898,000 | 1,609,000 | 2,898,000 | 1,609,000 |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 1,640,000 | 2,750,000 | 2,709,000 | 2,350,000 |  |
Provision (credits) | (54,000) | 148,000 | 209,000 | 548,000 |  |
Initial PCD allowance |  |  | 0 |  |  |
Charge-offs | 0 | 0 | (70,000) | 0 |  |
Recoveries | 23,000 | 0 | 52,000 | 0 |  |
Ending balance | 1,609,000 | 2,898,000 | 1,609,000 | 2,898,000 |  |
Consumer | Construction and land development | Adoption of ASC 326 |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | (1,291,000) |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | (1,291,000) |  |  |
Consumer | Construction and land development | Adjusted Balance |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 1,418,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 1,418,000 |  |  |
Consumer | Residential mortgage |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance | 43,731,000 | 17,711,000 | 43,731,000 | 17,711,000 | 43,731,000 |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 42,872,000 | 16,932,000 | 18,232,000 | 15,472,000 |  |
Provision (credits) | 837,000 | 1,024,000 | 9,339,000 | 2,903,000 |  |
Initial PCD allowance |  |  | 0 |  |  |
Charge-offs | (253,000) | (313,000) | (1,513,000) | (957,000) |  |
Recoveries | 275,000 | 68,000 | 555,000 | 293,000 |  |
Ending balance | 43,731,000 | 17,711,000 | 43,731,000 | 17,711,000 |  |
Consumer | Residential mortgage | Adoption of ASC 326 |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 17,118,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 17,118,000 |  |  |
Consumer | Residential mortgage | Adjusted Balance |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 35,350,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 35,350,000 |  |  |
Consumer | Revolving mortgage |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance | 25,659,000 | 20,635,000 | 25,659,000 | 20,635,000 | 25,659,000 |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 26,640,000 | 21,121,000 | 19,702,000 | 21,862,000 |  |
Provision (credits) | (958,000) | (153,000) | 2,557,000 | (272,000) |  |
Initial PCD allowance |  |  | 0 |  |  |
Charge-offs | (359,000) | (534,000) | (1,439,000) | (1,990,000) |  |
Recoveries | 336,000 | 201,000 | 1,174,000 | 1,035,000 |  |
Ending balance | 25,659,000 | 20,635,000 | 25,659,000 | 20,635,000 |  |
Consumer | Revolving mortgage | Adoption of ASC 326 |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 3,665,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 3,665,000 |  |  |
Consumer | Revolving mortgage | Adjusted Balance |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 23,367,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 23,367,000 |  |  |
Consumer | Consumer auto |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance | 9,183,000 |  | 9,183,000 |  | 9,183,000 |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 8,898,000 |  | 4,292,000 |  |  |
Provision (credits) | 708,000 |  | 5,708,000 |  |  |
Initial PCD allowance |  |  | 0 |  |  |
Charge-offs | (824,000) |  | (3,023,000) |  |  |
Recoveries | 401,000 |  | 1,106,000 |  |  |
Ending balance | 9,183,000 |  | 9,183,000 |  |  |
Consumer | Consumer auto | Adoption of ASC 326 |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 1,100,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 1,100,000 |  |  |
Consumer | Consumer auto | Adjusted Balance |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 5,392,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 5,392,000 |  |  |
Consumer | Consumer other |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance | 38,647,000 |  | 38,647,000 |  | 38,647,000 |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 39,295,000 |  | 30,301,000 |  |  |
Provision (credits) | 1,341,000 |  | 7,253,000 |  |  |
Initial PCD allowance |  |  | 0 |  |  |
Charge-offs | (3,673,000) |  | (13,490,000) |  |  |
Recoveries | 1,684,000 |  | 4,546,000 |  |  |
Ending balance | 38,647,000 |  | 38,647,000 |  |  |
Consumer | Consumer other | Adoption of ASC 326 |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 10,037,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 10,037,000 |  |  |
Consumer | Consumer other | Adjusted Balance |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 40,338,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 40,338,000 |  |  |
Consumer | Consumer |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  | 35,130,000 |  | 35,130,000 |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  | 35,105,000 |  | 35,841,000 |  |
Provision (credits) |  | 3,674,000 |  | 11,991,000 |  |
Charge-offs |  | (5,594,000) |  | (18,017,000) |  |
Recoveries |  | 1,945,000 |  | 5,315,000 |  |
Ending balance |  | 35,130,000 |  | 35,130,000 |  |
Non-PCD Loans |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 217,605,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 217,605,000 |  |  |
Non-PCD Loans | Adoption of ASC 326 |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  |  |  |  | (56,900,000)
Non-PCD Loans | Commercial | Construction and land development |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 33,213,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 33,213,000 |  |  |
Non-PCD Loans | Commercial | Commercial and industrial |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 59,374,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 59,374,000 |  |  |
Non-PCD Loans | Commercial | Other |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 2,236,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 2,236,000 |  |  |
Non-PCD Loans | Commercial | Mortgage |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 45,335,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 45,335,000 |  |  |
Non-PCD Loans | Commercial | Other commercial real estate |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 2,211,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 2,211,000 |  |  |
Non-PCD Loans | Consumer | Construction and land development |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 2,709,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 2,709,000 |  |  |
Non-PCD Loans | Consumer | Mortgage |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 18,232,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 18,232,000 |  |  |
Non-PCD Loans | Consumer | Consumer |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 34,593,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 34,593,000 |  |  |
PCD Loans |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance | 25,127,000 | 6,867,000 | 25,127,000 | 6,867,000 | $ 25,127,000 |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 26,928,000 | 8,343,000 | 7,536,000 | 9,144,000 |  |
Provision (credits) | (2,625,000) | (1,476,000) | (4,971,000) | (2,277,000) |  |
Initial PCD allowance |  |  | 1,193,000 |  |  |
Charge-offs | (495,000) | 0 | (3,010,000) | 0 |  |
Recoveries | 1,319,000 | 0 | 5,378,000 | 0 |  |
Ending balance | $ 25,127,000 | $ 6,867,000 | 25,127,000 | $ 6,867,000 |  |
PCD Loans | Adoption of ASC 326 |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 19,001,000 |  |  | $ 19,000,000.0
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 19,001,000 |  |  |
PCD Loans | Adjusted Balance |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Increase (decrease) in allowance |  |  | 26,537,000 |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | $ 26,537,000 |  |  |

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- Definition Financing Receivable, Allowance For Credit Loss, Decrease, COVID-19 + References No definition available. + Details
Name: | fcnca_FinancingReceivableAllowanceForCreditLossDecreaseCOVID19
Namespace Prefix: | fcnca_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Financing Receivable, Allowance For Credit Loss, Expected, COVID-19 + References No definition available. + Details
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- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118955202&loc=SL82895884-210446 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 + Details
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- Definition Amount of recovery of financing receivables doubtful of collection that were previously charged off. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=118955255&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
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