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Allowance for Credit Losses - Based On the Most Recent Analysis Performed, the Risk Category of Loans, By Type and Year of Originations (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Total loans | $ 3,043,946 |  | $ 3,043,946 |  | $ 2,861,728
Current-period gross charge-offs | 42 | $ 666 | 1,580 | $ 855 |
Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 | 292,514 |  | 292,514 |  | 513,980
2023 | 600,058 |  | 600,058 |  | 673,054
2022 | 620,470 |  | 620,470 |  | 459,295
2021 | 392,142 |  | 392,142 |  | 302,185
2020 | 271,365 |  | 271,365 |  | 203,527
Prior | 562,537 |  | 562,537 |  | 423,273
Revolving Loans | 304,860 |  | 304,860 |  | 286,414
Total loans | 3,043,946 |  | 3,043,946 |  | 2,861,728
2024 |  |  | 582 |  | 6
2023 |  |  | 278 |  | 719
2022 |  |  | 306 |  | 572
2021 |  |  | 60 |  | 7
2020 |  |  | 67 |  | 13
Prior |  |  | 287 |  | 109
Revolving Loans, Charge-offs |  |  |  |  | 5
Current-period gross charge-offs |  |  | 1,580 |  | 1,431
Commercial And Agriculture [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Total loans | 304,639 |  | 304,639 |  | 304,793
Current-period gross charge-offs |  | 614 | 1,079 | 754 |
Commercial And Agriculture [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 | 56,544 |  | 56,544 |  | 57,529
2023 | 56,493 |  | 56,493 |  | 64,336
2022 | 40,468 |  | 40,468 |  | 52,612
2021 | 36,061 |  | 36,061 |  | 19,443
2020 | 10,116 |  | 10,116 |  | 9,787
Prior | 15,637 |  | 15,637 |  | 14,267
Revolving Loans | 89,320 |  | 89,320 |  | 86,819
Total loans | 304,639 |  | 304,639 |  | 304,793
2024 |  |  | 555 |  |
2023 |  |  | 274 |  | 673
2022 |  |  | 177 |  | 532
2021 |  |  | 40 |  |
Prior |  |  | 33 |  | 95
Current-period gross charge-offs |  |  | 1,079 |  | 1,300
Commercial And Agriculture [Member] | Pass [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 | 55,290 |  | 55,290 |  | 56,359
2023 | 55,531 |  | 55,531 |  | 64,250
2022 | 39,824 |  | 39,824 |  | 52,258
2021 | 35,954 |  | 35,954 |  | 17,622
2020 | 8,736 |  | 8,736 |  | 9,516
Prior | 15,305 |  | 15,305 |  | 14,088
Revolving Loans | 84,456 |  | 84,456 |  | 82,982
Total loans | 295,096 |  | 295,096 |  | 297,075
Commercial And Agriculture [Member] | Special Mention [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 | 274 |  | 274 |  | 774
2023 | 679 |  | 679 |  |
2022 | 560 |  | 560 |  | 287
2021 | 36 |  | 36 |  | 1,690
2020 | 1,296 |  | 1,296 |  |
Prior |  |  |  |  | 106
Revolving Loans | 2,775 |  | 2,775 |  | 169
Total loans | 5,620 |  | 5,620 |  | 3,026
Commercial And Agriculture [Member] | Substandard [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 |  |  |  |  | 396
2023 | 283 |  | 283 |  | 86
2022 | 84 |  | 84 |  | 67
2021 | 71 |  | 71 |  | 131
2020 | 24 |  | 24 |  | 271
Prior | 332 |  | 332 |  | 73
Revolving Loans | 578 |  | 578 |  | 3,668
Total loans | 1,372 |  | 1,372 |  | 4,692
Commercial And Agriculture [Member] | Doubtful [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 | 980 |  | 980 |  |
2020 | 60 |  | 60 |  |
Revolving Loans | 1,511 |  | 1,511 |  |
Total loans | 2,551 |  | 2,551 |  |
Commercial Real Estate Owner Occupied [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Total loans | 375,751 |  | 375,751 |  | 377,321
Commercial Real Estate Owner Occupied [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 | 19,566 |  | 19,566 |  | 36,556
2023 | 44,125 |  | 44,125 |  | 82,950
2022 | 78,838 |  | 78,838 |  | 68,643
2021 | 64,295 |  | 64,295 |  | 56,586
2020 | 54,272 |  | 54,272 |  | 32,882
Prior | 106,500 |  | 106,500 |  | 93,860
Revolving Loans | 8,155 |  | 8,155 |  | 5,844
Total loans | 375,751 |  | 375,751 |  | 377,321
Commercial Real Estate Owner Occupied [Member] | Pass [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 | 19,566 |  | 19,566 |  | 36,030
2023 | 41,967 |  | 41,967 |  | 82,502
2022 | 75,716 |  | 75,716 |  | 67,904
2021 | 63,573 |  | 63,573 |  | 56,069
2020 | 53,884 |  | 53,884 |  | 29,784
Prior | 102,915 |  | 102,915 |  | 92,750
Revolving Loans | 7,729 |  | 7,729 |  | 5,844
Total loans | 365,350 |  | 365,350 |  | 370,883
Commercial Real Estate Owner Occupied [Member] | Special Mention [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 |  |  |  |  | 526
2023 | 2,158 |  | 2,158 |  | 217
2022 | 3,122 |  | 3,122 |  | 739
2021 | 722 |  | 722 |  | 517
2020 | 388 |  | 388 |  |
Prior | 369 |  | 369 |  | 188
Revolving Loans | 192 |  | 192 |  |
Total loans | 6,951 |  | 6,951 |  | 2,187
Commercial Real Estate Owner Occupied [Member] | Substandard [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2023 |  |  |  |  | 231
2020 |  |  |  |  | 3,098
Prior | 3,216 |  | 3,216 |  | 922
Revolving Loans | 234 |  | 234 |  |
Total loans | 3,450 |  | 3,450 |  | 4,251
Commercial Real Estate Non Owner Occupied [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Total loans | 1,205,453 |  | 1,205,453 |  | 1,161,894
Current-period gross charge-offs |  |  | 174 |  |
Commercial Real Estate Non Owner Occupied [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 | 39,452 |  | 39,452 |  | 183,439
2023 | 210,266 |  | 210,266 |  | 275,108
2022 | 298,194 |  | 298,194 |  | 205,003
2021 | 181,461 |  | 181,461 |  | 136,031
2020 | 126,972 |  | 126,972 |  | 120,781
Prior | 320,223 |  | 320,223 |  | 218,239
Revolving Loans | 28,885 |  | 28,885 |  | 23,293
Total loans | 1,205,453 |  | 1,205,453 |  | 1,161,894
Prior |  |  | 174 |  |
Current-period gross charge-offs |  |  | 174 |  |
Commercial Real Estate Non Owner Occupied [Member] | Pass [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 | 39,452 |  | 39,452 |  | 183,439
2023 | 209,690 |  | 209,690 |  | 269,334
2022 | 290,972 |  | 290,972 |  | 198,832
2021 | 167,461 |  | 167,461 |  | 136,031
2020 | 126,972 |  | 126,972 |  | 120,659
Prior | 297,066 |  | 297,066 |  | 206,267
Revolving Loans | 28,842 |  | 28,842 |  | 23,016
Total loans | 1,160,455 |  | 1,160,455 |  | 1,137,578
Commercial Real Estate Non Owner Occupied [Member] | Special Mention [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2023 | 576 |  | 576 |  | 5,774
2022 | 7,222 |  | 7,222 |  | 6,171
2021 | 6,000 |  | 6,000 |  |
Prior | 10,548 |  | 10,548 |  | 8,688
Revolving Loans | 43 |  | 43 |  | 277
Total loans | 24,389 |  | 24,389 |  | 20,910
Commercial Real Estate Non Owner Occupied [Member] | Substandard [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2021 | 8,000 |  | 8,000 |  |
2020 |  |  |  |  | 122
Prior | 12,609 |  | 12,609 |  | 3,284
Total loans | 20,609 |  | 20,609 |  | 3,406
Residential Portfolio Segment [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Total loans | 751,825 |  | 751,825 |  | 659,841
Current-period gross charge-offs | 1 | 1 | 67 | $ 12 |
Residential Portfolio Segment [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 | 83,993 |  | 83,993 |  | 90,956
2023 | 120,407 |  | 120,407 |  | 125,037
2022 | 121,993 |  | 121,993 |  | 98,566
2021 | 92,927 |  | 92,927 |  | 71,558
2020 | 66,666 |  | 66,666 |  | 34,116
Prior | 99,851 |  | 99,851 |  | 81,202
Revolving Loans | 165,988 |  | 165,988 |  | 158,406
Total loans | 751,825 |  | 751,825 |  | 659,841
2024 |  |  | 2 |  |
2023 |  |  |  |  | 6
2021 |  |  | 3 |  |
Prior |  |  | 62 |  | 11
Current-period gross charge-offs |  |  | 67 |  | 17
Residential Portfolio Segment [Member] | Pass [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 | 82,841 |  | 82,841 |  | 90,770
2023 | 119,802 |  | 119,802 |  | 124,695
2022 | 121,126 |  | 121,126 |  | 97,661
2021 | 91,845 |  | 91,845 |  | 71,379
2020 | 66,000 |  | 66,000 |  | 33,534
Prior | 96,691 |  | 96,691 |  | 78,894
Revolving Loans | 164,888 |  | 164,888 |  | 157,083
Total loans | 743,193 |  | 743,193 |  | 654,016
Residential Portfolio Segment [Member] | Special Mention [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2023 | 286 |  | 286 |  |
2022 |  |  |  |  | 221
2021 | 211 |  | 211 |  | 97
2020 | 93 |  | 93 |  |
Prior | 407 |  | 407 |  | 245
Revolving Loans | 75 |  | 75 |  |
Total loans | 1,072 |  | 1,072 |  | 563
Residential Portfolio Segment [Member] | Substandard [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 |  |  |  |  | 186
2023 | 319 |  | 319 |  | 342
2022 | 867 |  | 867 |  | 684
2021 | 871 |  | 871 |  | 82
2020 | 573 |  | 573 |  | 582
Prior | 2,753 |  | 2,753 |  | 2,063
Revolving Loans | 1,025 |  | 1,025 |  | 1,323
Total loans | 6,408 |  | 6,408 |  | 5,262
Residential Portfolio Segment [Member] | Doubtful [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 | 1,152 |  | 1,152 |  |
Total loans | 1,152 |  | 1,152 |  |
Real Estate Construction [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Total loans | 318,063 |  | 318,063 |  | 260,409
Real Estate Construction [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 | 74,486 |  | 74,486 |  | 108,606
2023 | 142,893 |  | 142,893 |  | 106,448
2022 | 69,044 |  | 69,044 |  | 21,928
2021 | 10,555 |  | 10,555 |  | 8,758
2020 | 7,533 |  | 7,533 |  | 2,699
Prior | 4,301 |  | 4,301 |  | 2,635
Revolving Loans | 9,251 |  | 9,251 |  | 9,335
Total loans | 318,063 |  | 318,063 |  | 260,409
Real Estate Construction [Member] | Pass [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 | 74,486 |  | 74,486 |  | 108,606
2023 | 142,893 |  | 142,893 |  | 105,222
2022 | 69,044 |  | 69,044 |  | 20,960
2021 | 10,400 |  | 10,400 |  | 6,739
2020 | 7,533 |  | 7,533 |  | 2,699
Prior | 4,301 |  | 4,301 |  | 2,635
Revolving Loans | 9,251 |  | 9,251 |  | 9,335
Total loans | 317,908 |  | 317,908 |  | 256,196
Real Estate Construction [Member] | Special Mention [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2023 |  |  |  |  | 1,226
2022 |  |  |  |  | 926
2021 | 155 |  | 155 |  | 2,019
Total loans | 155 |  | 155 |  | 4,171
Real Estate Construction [Member] | Substandard [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2022 |  |  |  |  | 42
Total loans |  |  |  |  | 42
Farm Real Estate [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Total loans | 24,122 |  | 24,122 |  | 24,771
Farm Real Estate [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 | 572 |  | 572 |  | 2,207
2023 | 2,310 |  | 2,310 |  | 967
2022 | 910 |  | 910 |  | 2,256
2021 | 2,144 |  | 2,144 |  | 4,462
2020 | 4,246 |  | 4,246 |  | 789
Prior | 12,114 |  | 12,114 |  | 12,798
Revolving Loans | 1,826 |  | 1,826 |  | 1,292
Total loans | 24,122 |  | 24,122 |  | 24,771
Farm Real Estate [Member] | Pass [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 | 572 |  | 572 |  | 2,207
2023 | 2,310 |  | 2,310 |  | 967
2022 | 501 |  | 501 |  | 2,256
2021 | 2,144 |  | 2,144 |  | 4,462
2020 | 4,246 |  | 4,246 |  | 789
Prior | 11,942 |  | 11,942 |  | 12,528
Revolving Loans | 1,676 |  | 1,676 |  | 1,292
Total loans | 23,391 |  | 23,391 |  | 24,501
Farm Real Estate [Member] | Special Mention [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2022 | 409 |  | 409 |  |
Prior | 172 |  | 172 |  | 20
Revolving Loans | 150 |  | 150 |  |
Total loans | 731 |  | 731 |  | 20
Farm Real Estate [Member] | Substandard [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Prior |  |  |  |  | 250
Total loans |  |  |  |  | 250
Lease Financing Receivables [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Total loans | 49,453 |  | 49,453 |  | 54,642
Current-period gross charge-offs | 15 |  | 186 |  |
Lease Financing Receivables [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 | 14,981 |  | 14,981 |  | 28,177
2023 | 19,489 |  | 19,489 |  | 14,071
2022 | 8,342 |  | 8,342 |  | 6,658
2021 | 2,297 |  | 2,297 |  | 3,754
2020 | 700 |  | 700 |  | 1,964
Prior | 3,644 |  | 3,644 |  | 18
Total loans | 49,453 |  | 49,453 |  | 54,642
2022 |  |  | 111 |  |
2021 |  |  | 12 |  |
2020 |  |  | 63 |  |
Current-period gross charge-offs |  |  | 186 |  |
Lease Financing Receivables [Member] | Pass [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 | 14,981 |  | 14,981 |  | 28,177
2023 | 19,244 |  | 19,244 |  | 13,924
2022 | 8,283 |  | 8,283 |  | 6,620
2021 | 2,297 |  | 2,297 |  | 3,678
2020 | 700 |  | 700 |  | 1,725
Prior | 3,644 |  | 3,644 |  | 1
Total loans | 49,149 |  | 49,149 |  | 54,125
Lease Financing Receivables [Member] | Special Mention [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2022 | 59 |  | 59 |  |
Total loans | 59 |  | 59 |  |
Lease Financing Receivables [Member] | Substandard [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2023 | 245 |  | 245 |  | 8
2022 |  |  |  |  | 38
2021 |  |  |  |  | 61
2020 |  |  |  |  | 231
Prior |  |  |  |  | 17
Total loans | 245 |  | 245 |  | 355
Lease Financing Receivables [Member] | Doubtful [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2023 |  |  |  |  | 139
2021 |  |  |  |  | 15
2020 |  |  |  |  | 8
Total loans |  |  |  |  | 162
Consumer And Other [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Total loans | 14,640 |  | 14,640 |  | 18,057
Current-period gross charge-offs | 26 | $ 51 | 74 |  |
Consumer And Other [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 | 2,920 |  | 2,920 |  | 6,510
2023 | 4,075 |  | 4,075 |  | 4,137
2022 | 2,681 |  | 2,681 |  | 3,629
2021 | 2,402 |  | 2,402 |  | 1,593
2020 | 860 |  | 860 |  | 509
Prior | 267 |  | 267 |  | 254
Revolving Loans | 1,435 |  | 1,435 |  | 1,425
Total loans | 14,640 |  | 14,640 |  | 18,057
2024 |  |  | 25 |  | 6
2023 |  |  | 4 |  | 40
2022 |  |  | 18 |  | 40
2021 |  |  | 5 |  | 7
2020 |  |  | 4 |  | 13
Prior |  |  | 18 |  | 3
Revolving Loans, Charge-offs |  |  |  |  | 5
Current-period gross charge-offs |  |  | 74 |  | 114
Consumer And Other [Member] | Pass [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2024 | 2,920 |  | 2,920 |  | 6,510
2023 | 4,068 |  | 4,068 |  | 4,135
2022 | 2,678 |  | 2,678 |  | 3,615
2021 | 2,389 |  | 2,389 |  | 1,578
2020 | 859 |  | 859 |  | 509
Prior | 267 |  | 267 |  | 248
Revolving Loans | 1,432 |  | 1,432 |  | 1,425
Total loans | 14,613 |  | 14,613 |  | 18,020
Consumer And Other [Member] | Special Mention [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Revolving Loans | 3 |  | 3 |  |
Total loans | 3 |  | 3 |  |
Consumer And Other [Member] | Substandard [Member] | Term Loans Amortized Cost Basis by Origination Year [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
2023 | 7 |  | 7 |  | 2
2022 | 3 |  | 3 |  | 14
2021 | 13 |  | 13 |  | 15
2020 | 1 |  | 1 |  |
Prior |  |  |  |  | 6
Total loans | $ 24 |  | $ 24 |  | $ 37

X
- Definition Financing receivable, allowance for credit loss, writeoff, year five, originated, four years before current fiscal year. + References No definition available. + Details
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Namespace Prefix: | civb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Financing receivable, allowance for credit loss, writeoff, year five, originated, more than five years before current fiscal year. + References No definition available. + Details
Name: | civb_FinancingReceivableAllowanceForCreditLossWriteoffYearFiveOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear
Namespace Prefix: | civb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Financing receivable, allowance for credit loss, writeoff, year four, originated, three years before current fiscal year. + References No definition available. + Details
Name: | civb_FinancingReceivableAllowanceForCreditLossWriteoffYearFourOriginatedThreeYearsBeforeCurrentFiscalYear
Namespace Prefix: | civb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Financing receivable, allowance for credit loss, writeoff, year one, originated, current fiscal year. + References No definition available. + Details
Name: | civb_FinancingReceivableAllowanceForCreditLossWriteoffYearOneOriginatedCurrentFiscalYear
Namespace Prefix: | civb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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