XML 92 R75.htm IDEA: XBRL DOCUMENT
v3.20.4

Loans and Allowance for Credit Losses - Schedule of Risk Rating and Payment Performance (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Jan. 01, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Risk Category Of Loans [Line Items] |  |  |
Total loans | $ 13,786,479 |  | $ 12,117,524
Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 13,786,479 | $ 12,122,002 |
Real Estate |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 101,194 |  |
Auto |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 3,292 |  |
Other |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 14,607 |  |
Commercial |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 3,956,422 |  | 2,890,296
Commercial | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 281,337 |  |
2016 | 130,543 |  |
2017 | 256,753 |  |
2018 | 202,025 |  |
2019 | 440,462 |  |
2020 | 1,709,047 |  |
Revolving Loans | 576,278 |  |
Revolving to Term Loans | 161,255 |  |
Total loans | 3,757,700 | 2,817,833 |
Commercial | Commercial Real Estate - Construction |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 713,092
Commercial | Commercial Real Estate - Other |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 4,453,700
Commercial | Real Estate |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 8,976 |  |
Commercial | Auto |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 394 |  |
Commercial | Other |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 893 |  |
Commercial real estate |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 5,946,512 |  | 5,166,792
Commercial real estate | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 571,651 |  |
2016 | 539,960 |  |
2017 | 779,186 |  |
2018 | 794,524 |  |
2019 | 1,099,162 |  |
2020 | 1,556,959 |  |
Revolving Loans | 28,122 |  |
Revolving to Term Loans | 405,247 |  |
Total loans | 5,774,811 | 4,890,890 |
Commercial real estate | Real Estate |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 60,844 |  |
Commercial real estate | Auto |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 0 |  |
Commercial real estate | Other |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 13,685 |  |
BBCC | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 5,357 |  |
2016 | 25,622 |  |
2017 | 37,218 |  |
2018 | 51,672 |  |
2019 | 77,287 |  |
2020 | 96,821 |  |
Revolving Loans | 53,667 |  |
Revolving to Term Loans | 22,779 |  |
Total loans | 370,423 | 352,714 |
BBCC | Real Estate |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 1,425 |  |
BBCC | Auto |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 134 |  |
BBCC | Other |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 0 |  |
Residential real estate |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 641,774 |  |
2016 | 204,588 |  |
2017 | 191,268 |  |
2018 | 132,787 |  |
2019 | 453,383 |  |
2020 | 624,500 |  |
Revolving Loans | 0 |  |
Revolving to Term Loans | 122 |  |
Total loans | 2,248,422 |  | 2,334,289
Residential real estate | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 2,248,422 | 2,334,394 |
Residential real estate | Performing |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 620,999 |  |
2016 | 202,457 |  |
2017 | 190,376 |  |
2018 | 132,107 |  |
2019 | 453,132 |  |
2020 | 624,435 |  |
Revolving Loans | 0 |  |
Revolving to Term Loans | 122 |  |
Total loans | 2,223,628 |  | 2,311,670
Residential real estate | Nonperforming |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 20,775 |  |
2016 | 2,131 |  |
2017 | 892 |  |
2018 | 680 |  |
2019 | 251 |  |
2020 | 65 |  |
Revolving Loans | 0 |  |
Revolving to Term Loans | 0 |  |
Total loans | 24,794 |  | 22,619
Residential real estate | Real Estate |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 24,794 |  |
Residential real estate | Auto |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 0 |  |
Residential real estate | Other |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 0 |  |
Indirect |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 21,280 |  |
2016 | 52,654 |  |
2017 | 97,253 |  |
2018 | 135,670 |  |
2019 | 253,957 |  |
2020 | 353,011 |  |
Revolving Loans | 0 |  |
Revolving to Term Loans | 77 |  |
Total loans | 913,902 |  |
Indirect | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 913,902 | 935,594 |
Indirect | Performing |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 21,088 |  |
2016 | 52,225 |  |
2017 | 96,587 |  |
2018 | 134,893 |  |
2019 | 253,514 |  |
2020 | 352,989 |  |
Revolving Loans | 0 |  |
Revolving to Term Loans | 77 |  |
Total loans | 911,373 |  |
Indirect | Nonperforming |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 192 |  |
2016 | 429 |  |
2017 | 666 |  |
2018 | 777 |  |
2019 | 443 |  |
2020 | 22 |  |
Revolving Loans | 0 |  |
Revolving to Term Loans | 0 |  |
Total loans | 2,529 |  |
Indirect | Real Estate |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 0 |  |
Indirect | Auto |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 2,529 |  |
Indirect | Other |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 0 |  |
Direct |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 19,991 |  |
2016 | 8,774 |  |
2017 | 16,246 |  |
2018 | 30,681 |  |
2019 | 29,330 |  |
2020 | 32,521 |  |
Revolving Loans | 26,032 |  |
Revolving to Term Loans | 1,232 |  |
Total loans | 164,807 |  |
Direct | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 164,807 | 228,526 |
Direct | Performing |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 19,465 |  |
2016 | 8,527 |  |
2017 | 16,182 |  |
2018 | 30,510 |  |
2019 | 29,189 |  |
2020 | 32,499 |  |
Revolving Loans | 26,028 |  |
Revolving to Term Loans | 1,229 |  |
Total loans | 163,629 |  |
Direct | Nonperforming |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 526 |  |
2016 | 247 |  |
2017 | 64 |  |
2018 | 171 |  |
2019 | 141 |  |
2020 | 22 |  |
Revolving Loans | 4 |  |
Revolving to Term Loans | 3 |  |
Total loans | 1,178 |  |
Direct | Real Estate |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 901 |  |
Direct | Auto |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 235 |  |
Direct | Other |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 29 |  |
Home equity |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 116 |  |
2016 | 249 |  |
2017 | 891 |  |
2018 | 444 |  |
2019 | 1,034 |  |
2020 | 1 |  |
Revolving Loans | 529,369 |  |
Revolving to Term Loans | 24,310 |  |
Total loans | 556,414 |  |
Home equity | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 556,414 | $ 562,051 |
Home equity | Performing |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 0 |  |
2016 | 238 |  |
2017 | 891 |  |
2018 | 444 |  |
2019 | 997 |  |
2020 | 1 |  |
Revolving Loans | 529,275 |  |
Revolving to Term Loans | 20,314 |  |
Total loans | 552,160 |  |
Home equity | Nonperforming |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 116 |  |
2016 | 11 |  |
2017 | 0 |  |
2018 | 0 |  |
2019 | 37 |  |
2020 | 0 |  |
Revolving Loans | 94 |  |
Revolving to Term Loans | 3,996 |  |
Total loans | 4,254 |  |
Home equity | Real Estate |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 4,254 |  |
Home equity | Auto |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 0 |  |
Home equity | Other |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 0 |  |
Consumer |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans | 1,635,123 |  | 1,726,147
Consumer | Home Equity Line of Credit |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 559,021
Consumer | Home Equity Line of Credit | Performing |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 555,025
Consumer | Home Equity Line of Credit | Nonperforming |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 3,996
Consumer | Auto |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 1,017,287
Consumer | Auto | Performing |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 1,013,760
Consumer | Auto | Nonperforming |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 3,527
Consumer | Other |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 149,839
Consumer | Other | Performing |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 147,383
Consumer | Other | Nonperforming |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 2,456
Pass | Commercial |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 2,702,605
Pass | Commercial | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 262,538 |  |
2016 | 124,041 |  |
2017 | 227,710 |  |
2018 | 171,228 |  |
2019 | 420,736 |  |
2020 | 1,675,964 |  |
Revolving Loans | 549,849 |  |
Revolving to Term Loans | 148,508 |  |
Total loans | 3,580,574 |  |
Pass | Commercial | Commercial Real Estate - Construction |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 665,512
Pass | Commercial | Commercial Real Estate - Other |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 4,191,455
Pass | Commercial real estate | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 513,658 |  |
2016 | 496,086 |  |
2017 | 677,119 |  |
2018 | 749,102 |  |
2019 | 1,041,305 |  |
2020 | 1,537,226 |  |
Revolving Loans | 28,122 |  |
Revolving to Term Loans | 382,219 |  |
Total loans | 5,424,837 |  |
Pass | BBCC | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 5,327 |  |
2016 | 24,946 |  |
2017 | 36,288 |  |
2018 | 49,875 |  |
2019 | 73,913 |  |
2020 | 94,828 |  |
Revolving Loans | 52,393 |  |
Revolving to Term Loans | 19,353 |  |
Total loans | 356,923 |  |
Criticized | Commercial |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 84,676
Criticized | Commercial | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 5,369 |  |
2016 | 3,383 |  |
2017 | 9,508 |  |
2018 | 15,003 |  |
2019 | 9,603 |  |
2020 | 23,982 |  |
Revolving Loans | 10,307 |  |
Revolving to Term Loans | 2,685 |  |
Total loans | 79,840 |  |
Criticized | Commercial | Commercial Real Estate - Construction |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 34,651
Criticized | Commercial | Commercial Real Estate - Other |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 115,514
Criticized | Commercial real estate | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 33,490 |  |
2016 | 17,648 |  |
2017 | 46,994 |  |
2018 | 26,464 |  |
2019 | 49,271 |  |
2020 | 6,874 |  |
Revolving Loans | 0 |  |
Revolving to Term Loans | 19,804 |  |
Total loans | 200,545 |  |
Criticized | BBCC | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 0 |  |
2016 | 643 |  |
2017 | 414 |  |
2018 | 621 |  |
2019 | 1,403 |  |
2020 | 1,599 |  |
Revolving Loans | 868 |  |
Revolving to Term Loans | 1,259 |  |
Total loans | 6,807 |  |
Classified - Substandard | Commercial |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 63,979
Classified - Substandard | Commercial | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 8,441 |  |
2016 | 2,774 |  |
2017 | 9,836 |  |
2018 | 10,077 |  |
2019 | 6,369 |  |
2020 | 6,501 |  |
Revolving Loans | 15,344 |  |
Revolving to Term Loans | 3,049 |  |
Total loans | 62,391 |  |
Classified - Substandard | Commercial | Commercial Real Estate - Construction |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 0
Classified - Substandard | Commercial | Commercial Real Estate - Other |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 101,693
Classified - Substandard | Commercial real estate | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 8,665 |  |
2016 | 5,308 |  |
2017 | 26,691 |  |
2018 | 13,565 |  |
2019 | 4,700 |  |
2020 | 11,451 |  |
Revolving Loans | 0 |  |
Revolving to Term Loans | 2,911 |  |
Total loans | 73,291 |  |
Classified - Substandard | BBCC | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 0 |  |
2016 | 33 |  |
2017 | 246 |  |
2018 | 195 |  |
2019 | 1,417 |  |
2020 | 233 |  |
Revolving Loans | 317 |  |
Revolving to Term Loans | 701 |  |
Total loans | 3,142 |  |
Classified - Nonaccrual | Commercial |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 22,240
Classified - Nonaccrual | Commercial | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 4,379 |  |
2016 | 49 |  |
2017 | 6,951 |  |
2018 | 4,701 |  |
2019 | 3,754 |  |
2020 | 2,600 |  |
Revolving Loans | 778 |  |
Revolving to Term Loans | 7,013 |  |
Total loans | 30,225 |  |
Classified - Nonaccrual | Commercial | Commercial Real Estate - Construction |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 12,929
Classified - Nonaccrual | Commercial | Commercial Real Estate - Other |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 38,822
Classified - Nonaccrual | Commercial real estate | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 12,564 |  |
2016 | 1,635 |  |
2017 | 9,456 |  |
2018 | 5,393 |  |
2019 | 2,054 |  |
2020 | 1,408 |  |
Revolving Loans | 0 |  |
Revolving to Term Loans | 313 |  |
Total loans | 32,823 |  |
Classified - Nonaccrual | BBCC | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 0 |  |
2016 | 0 |  |
2017 | 200 |  |
2018 | 134 |  |
2019 | 551 |  |
2020 | 161 |  |
Revolving Loans | 89 |  |
Revolving to Term Loans | 1,466 |  |
Total loans | 2,601 |  |
Classified - Doubtful | Commercial |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 16,796
Classified - Doubtful | Commercial | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 610 |  |
2016 | 296 |  |
2017 | 2,748 |  |
2018 | 1,016 |  |
2019 | 0 |  |
2020 | 0 |  |
Revolving Loans | 0 |  |
Revolving to Term Loans | 0 |  |
Total loans | 4,670 |  |
Classified - Doubtful | Commercial | Commercial Real Estate - Construction |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | 0
Classified - Doubtful | Commercial | Commercial Real Estate - Other |  |  |
Risk Category Of Loans [Line Items] |  |  |
Total loans |  |  | $ 6,216
Classified - Doubtful | Commercial real estate | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 3,274 |  |
2016 | 19,283 |  |
2017 | 18,926 |  |
2018 | 0 |  |
2019 | 1,832 |  |
2020 | 0 |  |
Revolving Loans | 0 |  |
Revolving to Term Loans | 0 |  |
Total loans | 43,315 |  |
Classified - Doubtful | BBCC | Adjusted Balance |  |  |
Risk Category Of Loans [Line Items] |  |  |
Prior to 2016 | 30 |  |
2016 | 0 |  |
2017 | 70 |  |
2018 | 847 |  |
2019 | 3 |  |
2020 | 0 |  |
Revolving Loans | 0 |  |
Revolving to Term Loans | 0 |  |
Total loans | $ 950 |  |

X
- Definition Amount of financing receivable originated more than five years prior to current fiscal year. + 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=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated four years prior to current fiscal year. + 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=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated in current fiscal year. + 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=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated in fiscal year prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 Reference 2: 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=121647567&loc=SL82922352-210448 + Details
Name: | us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated three years prior to current fiscal year. + 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=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated two years prior to current fiscal year. + 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=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of financing receivable that can be withdrawn, repaid and redrawn. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 Reference 2: 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=121647567&loc=SL82922352-210448 + Details
Name: | us-gaap_FinancingReceivableRevolving
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of revolving financing receivable converted to term loan. + 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=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6A -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL120270059-210447 + Details
Name: | us-gaap_FinancingReceivableRevolvingConvertedToTermLoan
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, before allowance for credit loss, of financing receivable. + 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=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919230-210447 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448 + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | srt_CumulativeEffectPeriodOfAdoptionAxis=srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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

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

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=onb_BusinessBankingCreditCenterPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentPerformanceStatusAxis=us-gaap_PerformingFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentPerformanceStatusAxis=us-gaap_NonperformingFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=onb_IndirectPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=onb_DirectPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=onb_HomeEquityPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_CriticizedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=onb_NonAccrualMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_DoubtfulMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |