XML 89 R73.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Allowance for Loan and Lease Losses (Summary of Activity In Allowance for Loan and Lease Losses) (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | $ 218,795 | $ 206,216 | $ 204,466 |  |  |
Provisions | 25,692 | 32,941 | 20,664 |  |  |
Charge-offs | (36,682) | (30,201) | (28,348) |  |  |
Recoveries | 14,088 | 9,839 | 9,434 |  |  |
Net charge-offs | (22,594) | (20,362) | (18,914) |  |  |
Ending balance | 221,893 | 218,795 | 206,216 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Total allowance for loan and lease losses | 218,795 | 206,216 | 204,466 | $ 221,893 | $ 218,795 | $ 206,216
Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Net Loans and Leases |  |  |  | 23,374,932 | 21,519,083 |
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract] |  |  |  |  |  |
ALLL for loans and leases acquired with deteriorated credit quality |  |  |  | 221,893 | 218,795 |
PCI Loans |  |  |  | 762,998 | 809,169 | 950,516
Commercial |  |  |  |  |  |
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract] |  |  |  |  |  |
PCI Loans |  |  |  | 396,938 | 499,970 |
Commercial | Construction and land development |  |  |  |  |  |
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract] |  |  |  |  |  |
PCI Loans |  |  |  | 13,654 | 20,766 |
Commercial | Mortgage |  |  |  |  |  |
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract] |  |  |  |  |  |
PCI Loans |  |  |  | 358,103 | 453,013 |
Commercial | Other commercial real estate |  |  |  |  |  |
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract] |  |  |  |  |  |
PCI Loans |  |  |  | 17,124 | 12,645 |
Commercial | Commercial and industrial |  |  |  |  |  |
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract] |  |  |  |  |  |
PCI Loans |  |  |  | 6,374 | 11,844 |
Commercial | Other |  |  |  |  |  |
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract] |  |  |  |  |  |
PCI Loans |  |  |  | 1,683 | 1,702 |
Commercial | Consumer and Other |  |  |  |  |  |
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract] |  |  |  |  |  |
PCI Loans |  |  |  | 1,683 | 1,702 |
Noncommercial |  |  |  |  |  |
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract] |  |  |  |  |  |
PCI Loans |  |  |  | 366,060 | 309,199 |
Noncommercial | Consumer |  |  |  |  |  |
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract] |  |  |  |  |  |
PCI Loans |  |  |  | 2,190 | 1,772 |
Non-PCI Loans |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 205,026 | 189,904 | 182,837 |  |  |
Provisions | 29,139 | 34,870 | 22,937 |  |  |
Charge-offs | (36,386) | (29,587) | (25,304) |  |  |
Recoveries | 14,088 | 9,839 | 9,434 |  |  |
Net charge-offs | (22,298) | (19,748) | (15,870) |  |  |
Ending balance | 211,867 | 205,026 | 189,904 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
ALLL for loans and leases individually evaluated for impairment |  |  |  | 9,728 | 9,210 |
ALLL for loans and leases collectively evaluated for impairment |  |  |  | 202,139 | 195,816 |
Total allowance for loan and lease losses | 205,026 | 189,904 | 182,837 | 211,867 | 205,026 | 189,904
Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Loans and leases individually evaluated for impairment |  |  |  | 155,646 | 136,399 |
Loans and leases collectively evaluated for impairment |  |  |  | 22,678,181 | 20,792,310 |
Net Loans and Leases |  |  |  | 22,833,827 | 20,928,709 |
Non-PCI Loans | Commercial | Construction and land development |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 28,877 | 16,288 | 11,961 |  |  |
Provisions | (4,329) | 12,871 | 4,773 |  |  |
Charge-offs | (599) | (680) | (1,012) |  |  |
Recoveries | 521 | 398 | 566 |  |  |
Ending balance | 24,470 | 28,877 | 16,288 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
ALLL for loans and leases individually evaluated for impairment |  |  |  | 185 | 151 |
ALLL for loans and leases collectively evaluated for impairment |  |  |  | 24,285 | 28,726 |
Total allowance for loan and lease losses | 28,877 | 16,288 | 11,961 | 24,470 | 28,877 | 16,288
Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Loans and leases individually evaluated for impairment |  |  |  | 788 | 1,045 |
Loans and leases collectively evaluated for impairment |  |  |  | 668,427 | 648,112 |
Net Loans and Leases |  |  |  | 669,215 | 649,157 |
Non-PCI Loans | Commercial | Mortgage |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 48,278 | 69,896 | 85,189 |  |  |
Provisions | (5,694) | (21,912) | (15,822) |  |  |
Charge-offs | (421) | (987) | (1,498) |  |  |
Recoveries | 2,842 | 1,281 | 2,027 |  |  |
Ending balance | 45,005 | 48,278 | 69,896 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
ALLL for loans and leases individually evaluated for impairment |  |  |  | 3,648 | 3,488 |
ALLL for loans and leases collectively evaluated for impairment |  |  |  | 41,357 | 44,790 |
Total allowance for loan and lease losses | 48,278 | 69,896 | 85,189 | 45,005 | 48,278 | 69,896
Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Loans and leases individually evaluated for impairment |  |  |  | 73,655 | 76,361 |
Loans and leases collectively evaluated for impairment |  |  |  | 9,655,367 | 8,949,859 |
Net Loans and Leases |  |  |  | 9,729,022 | 9,026,220 |
Non-PCI Loans | Commercial | Other commercial real estate |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 3,269 | 2,168 | 732 |  |  |
Provisions | 1,280 | 925 | 1,569 |  |  |
Charge-offs | (5) | 0 | (178) |  |  |
Recoveries | 27 | 176 | 45 |  |  |
Ending balance | 4,571 | 3,269 | 2,168 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
ALLL for loans and leases individually evaluated for impairment |  |  |  | 209 | 152 |
ALLL for loans and leases collectively evaluated for impairment |  |  |  | 4,362 | 3,117 |
Total allowance for loan and lease losses | 3,269 | 2,168 | 732 | 4,571 | 3,269 | 2,168
Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Loans and leases individually evaluated for impairment |  |  |  | 1,857 | 1,563 |
Loans and leases collectively evaluated for impairment |  |  |  | 471,576 | 349,728 |
Net Loans and Leases |  |  |  | 473,433 | 351,291 |
Non-PCI Loans | Commercial | Commercial and industrial |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 50,225 | 43,116 | 30,727 |  |  |
Provisions | 10,658 | 14,583 | 17,432 |  |  |
Charge-offs | (10,926) | (9,013) | (5,952) |  |  |
Recoveries | 3,740 | 1,539 | 909 |  |  |
Ending balance | 53,697 | 50,225 | 43,116 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
ALLL for loans and leases individually evaluated for impairment |  |  |  | 665 | 1,732 |
ALLL for loans and leases collectively evaluated for impairment |  |  |  | 53,032 | 48,493 |
Total allowance for loan and lease losses | 50,225 | 43,116 | 30,727 | 53,697 | 50,225 | 43,116
Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Loans and leases individually evaluated for impairment |  |  |  | 7,974 | 12,600 |
Loans and leases collectively evaluated for impairment |  |  |  | 2,722,433 | 2,554,901 |
Net Loans and Leases |  |  |  | 2,730,407 | 2,567,501 |
Non-PCI Loans | Commercial | Lease financing |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 5,907 | 5,524 | 4,286 |  |  |
Provisions | 966 | 635 | 1,602 |  |  |
Charge-offs | (995) | (442) | (402) |  |  |
Recoveries | 249 | 190 | 38 |  |  |
Ending balance | 6,127 | 5,907 | 5,524 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
ALLL for loans and leases individually evaluated for impairment |  |  |  | 397 | 75 |
ALLL for loans and leases collectively evaluated for impairment |  |  |  | 5,730 | 5,832 |
Total allowance for loan and lease losses | 5,907 | 5,524 | 4,286 | 6,127 | 5,907 | 5,524
Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Loans and leases individually evaluated for impairment |  |  |  | 1,914 | 1,074 |
Loans and leases collectively evaluated for impairment |  |  |  | 892,887 | 825,196 |
Net Loans and Leases |  |  |  | 894,801 | 826,270 |
Non-PCI Loans | Commercial | Other |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 3,127 | 1,855 | 3,184 |  |  |
Provisions | 2,189 | 877 | (1,420) |  |  |
Charge-offs | (912) | (144) | 0 |  |  |
Recoveries | 285 | 539 | 91 |  |  |
Ending balance | 4,689 | 3,127 | 1,855 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
ALLL for loans and leases individually evaluated for impairment |  |  |  | 0 | 23 |
ALLL for loans and leases collectively evaluated for impairment |  |  |  | 4,689 | 3,104 |
Total allowance for loan and lease losses | 3,127 | 1,855 | 3,184 | 4,689 | 3,127 | 1,855
Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Loans and leases individually evaluated for impairment |  |  |  | 521 | 142 |
Loans and leases collectively evaluated for impairment |  |  |  | 301,655 | 340,122 |
Net Loans and Leases |  |  |  | 302,176 | 340,264 |
Non-PCI Loans | Noncommercial | Construction and land development |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 1,596 | 1,485 | 892 |  |  |
Provisions | 2,366 | 45 | 541 |  |  |
Charge-offs | 0 | 0 | (22) |  |  |
Recoveries | 0 | 66 | 74 |  |  |
Ending balance | 3,962 | 1,596 | 1,485 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
ALLL for loans and leases individually evaluated for impairment |  |  |  | 68 | 109 |
ALLL for loans and leases collectively evaluated for impairment |  |  |  | 3,894 | 1,487 |
Total allowance for loan and lease losses | 1,596 | 1,485 | 892 | 3,962 | 1,596 | 1,485
Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Loans and leases individually evaluated for impairment |  |  |  | 4,551 | 2,613 |
Loans and leases collectively evaluated for impairment |  |  |  | 243,738 | 228,787 |
Net Loans and Leases |  |  |  | 248,289 | 231,400 |
Non-PCI Loans | Noncommercial | Mortgage |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 14,447 | 14,105 | 10,661 |  |  |
Provisions | 2,096 | 801 | 4,202 |  |  |
Charge-offs | (1,376) | (926) | (1,619) |  |  |
Recoveries | 539 | 467 | 861 |  |  |
Ending balance | 15,706 | 14,447 | 14,105 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
ALLL for loans and leases individually evaluated for impairment |  |  |  | 2,733 | 2,447 |
ALLL for loans and leases collectively evaluated for impairment |  |  |  | 12,973 | 12,000 |
Total allowance for loan and lease losses | 14,447 | 14,105 | 10,661 | 15,706 | 14,447 | 14,105
Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Loans and leases individually evaluated for impairment |  |  |  | 37,842 | 31,476 |
Loans and leases collectively evaluated for impairment |  |  |  | 3,485,944 | 2,857,648 |
Net Loans and Leases |  |  |  | 3,523,786 | 2,889,124 |
Non-PCI Loans | Noncommercial | Revolving mortgage |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 21,013 | 15,971 | 18,650 |  |  |
Provisions | 2,509 | 7,413 | (927) |  |  |
Charge-offs | (2,368) | (3,287) | (2,925) |  |  |
Recoveries | 1,282 | 916 | 1,173 |  |  |
Ending balance | 22,436 | 21,013 | 15,971 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
ALLL for loans and leases individually evaluated for impairment |  |  |  | 1,085 | 366 |
ALLL for loans and leases collectively evaluated for impairment |  |  |  | 21,351 | 20,647 |
Total allowance for loan and lease losses | 21,013 | 15,971 | 18,650 | 22,436 | 21,013 | 15,971
Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Loans and leases individually evaluated for impairment |  |  |  | 23,770 | 7,613 |
Loans and leases collectively evaluated for impairment |  |  |  | 2,677,755 | 2,593,731 |
Net Loans and Leases |  |  |  | 2,701,525 | 2,601,344 |
Non-PCI Loans | Noncommercial | Consumer |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 28,287 | 19,496 | 16,555 |  |  |
Provisions | 17,098 | 18,632 | 10,987 |  |  |
Charge-offs | (18,784) | (14,108) | (11,696) |  |  |
Recoveries | 4,603 | 4,267 | 3,650 |  |  |
Ending balance | 31,204 | 28,287 | 19,496 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
ALLL for loans and leases individually evaluated for impairment |  |  |  | 738 | 667 |
ALLL for loans and leases collectively evaluated for impairment |  |  |  | 30,466 | 27,620 |
Total allowance for loan and lease losses | 28,287 | 19,496 | 16,555 | 31,204 | 28,287 | 19,496
Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Loans and leases individually evaluated for impairment |  |  |  | 2,774 | 1,912 |
Loans and leases collectively evaluated for impairment |  |  |  | 1,558,399 | 1,444,226 |
Net Loans and Leases |  |  |  | 1,561,173 | 1,446,138 |
PCI Loans |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 13,769 | 16,312 | 21,629 |  |  |
Provisions | (3,447) | (1,929) | (2,273) |  |  |
Charge-offs | (296) | (614) | (3,044) |  |  |
Recoveries | 0 | 0 | 0 |  |  |
Net charge-offs | (296) | (614) | (3,044) |  |  |
Ending balance | 10,026 | 13,769 | 16,312 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Total allowance for loan and lease losses | 13,769 | 16,312 | 21,629 | 10,026 | 13,769 | 16,312
PCI Loans | Commercial | Construction and land development |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 483 | 1,082 | 150 |  |  |
Provisions | (148) | (599) | 1,029 |  |  |
Charge-offs | 0 | 0 | (97) |  |  |
Recoveries | 0 | 0 | 0 |  |  |
Ending balance | 335 | 483 | 1,082 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Total allowance for loan and lease losses | 483 | 1,082 | 150 | 335 | 483 | 1,082
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract] |  |  |  |  |  |
PCI Loans |  |  |  | 13,654 | 20,766 |
PCI Loans | Commercial | Mortgage |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 6,423 | 7,838 | 10,135 |  |  |
Provisions | 437 | (1,249) | (1,426) |  |  |
Charge-offs | (296) | (166) | (871) |  |  |
Recoveries | 0 | 0 | 0 |  |  |
Ending balance | 6,564 | 6,423 | 7,838 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Total allowance for loan and lease losses | 6,423 | 7,838 | 10,135 | 6,564 | 6,423 | 7,838
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract] |  |  |  |  |  |
PCI Loans |  |  |  | 358,103 | 453,013 |
PCI Loans | Commercial | Other commercial real estate |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 502 | 773 | 75 |  |  |
Provisions | (281) | (266) | 698 |  |  |
Charge-offs | 0 | (5) | 0 |  |  |
Recoveries | 0 | 0 |  |  |  |
Ending balance | 221 | 502 | 773 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Total allowance for loan and lease losses | 502 | 773 | 75 | 221 | 502 | 773
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract] |  |  |  |  |  |
PCI Loans |  |  |  | 17,124 | 12,645 |
PCI Loans | Commercial | Commercial and industrial |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 504 | 445 | 1,240 |  |  |
Provisions | (198) | 59 | (470) |  |  |
Charge-offs | 0 | 0 | (325) |  |  |
Recoveries | 0 | 0 | 0 |  |  |
Ending balance | 306 | 504 | 445 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Total allowance for loan and lease losses | 504 | 445 | 1,240 | 306 | 504 | 445
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract] |  |  |  |  |  |
PCI Loans |  |  |  | 6,374 | 11,844 |
PCI Loans | Noncommercial |  |  |  |  |  |
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract] |  |  |  |  |  |
PCI Loans |  |  |  | 366,060 | 309,199 |
PCI Loans | Noncommercial | Construction and land development |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 0 | 0 | 183 |  |  |
Provisions | 0 | 0 | (183) |  |  |
Charge-offs | 0 | 0 | 0 |  |  |
Recoveries | 0 | 0 | 0 |  |  |
Ending balance | 0 | 0 | 0 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Total allowance for loan and lease losses | 0 | 0 | 183 | 0 | 0 | 0
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract] |  |  |  |  |  |
PCI Loans |  |  |  | 644 | 0 |
PCI Loans | Noncommercial | Mortgage |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 4,818 | 5,398 | 5,820 |  |  |
Provisions | (2,701) | (209) | 72 |  |  |
Charge-offs | 0 | (371) | (494) |  |  |
Recoveries | 0 | 0 | 0 |  |  |
Ending balance | 2,117 | 4,818 | 5,398 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Total allowance for loan and lease losses | 4,818 | 5,398 | 5,820 | 2,117 | 4,818 | 5,398
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract] |  |  |  |  |  |
PCI Loans |  |  |  | 299,318 | 268,777 |
PCI Loans | Noncommercial | Revolving mortgage |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 956 | 523 | 3,999 |  |  |
Provisions | (697) | 433 | (2,720) |  |  |
Charge-offs | 0 | 0 | (756) |  |  |
Recoveries | 0 | 0 | 0 |  |  |
Ending balance | 259 | 956 | 523 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Total allowance for loan and lease losses | 956 | 523 | 3,999 | 259 | 956 | 523
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract] |  |  |  |  |  |
PCI Loans |  |  |  | 63,908 | 38,650 |
PCI Loans | Noncommercial | Consumer |  |  |  |  |  |
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract] |  |  |  |  |  |
PCI Loans |  |  |  | 2,190 | 1,772 |
PCI Loans | Noncommercial | Consumer and Other |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 83 | 253 | 27 |  |  |
Provisions | 141 | (98) | 727 |  |  |
Charge-offs | 0 | (72) | (501) |  |  |
Recoveries | 0 | 0 | 0 |  |  |
Ending balance | 224 | 83 | 253 |  |  |
Allowance for Loans and Leases Evaluated for Impairment [Abstract] |  |  |  |  |  |
Total allowance for loan and lease losses | $ 83 | $ 253 | $ 27 | 224 | 83 | $ 253
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract] |  |  |  |  |  |
PCI Loans |  |  |  | $ 3,873 | $ 3,474 |

X
- Definition Loan and lease acquired with deteriorated credit quality [Abstract] + References No definition available. + Details
Name: | fcnca_LoanAndLeaseAcquiredWithDeterioratedCreditQualityAbstract
Namespace Prefix: | fcnca_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after recoveries, of loans and leases that have been written-off. + References No definition available. + Details
Name: | us-gaap_AllowanceForLoanAndLeaseLossesWriteoffsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and other-than-temporary impairments), for loans accounted for as debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82894507&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 + Details
Name: | us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesCarryingAmountNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossAdditionalInformationAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of recovery of financing receivables doubtful of collection that were previously charged off. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of direct write-downs of financing receivables charged against the allowance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_LoanAndLeaseReceivablesImpairedAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 + Details
Name: | us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_LoansAndLeasesReceivableNetReportedAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
Name: | us-gaap_ProvisionForLoanLeaseAndOtherLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_ConstructionLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_MortgageReceivablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=fcnca_OtherRealEstateLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=fcnca_CommercialAndIndustrialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=fcnca_OtherLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=fcnca_ConsumerAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fcnca_NoncommercialSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_ConsumerLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fcnca_LoanDesignationAxis=fcnca_NonPCILoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_FinanceLeasesPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_HomeEquityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fcnca_LoanDesignationAxis=us-gaap_ReceivablesAcquiredWithDeterioratedCreditQualityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |