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Regulatory Restrictions - Schedule of Capital Ratios (Details) $ in Thousands | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
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Old National Bancorp |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total capital to risk-weighted assets actual, amount | $ 4,321,716 | $ 2,119,176
Common equity Tier 1 capital to risk-weighted assets actual, amount | 3,605,393 | 1,998,056
Tier 1 capital to risk-weighted assets actual, amount | 3,849,112 | 1,998,056
Tier 1 capital to average assets actual, amount | $ 3,849,112 | $ 1,998,056
Total capital to risk-weighted assets actual, ratio | 0.1202 | 0.1277
Common equity Tier 1 capital to risk-weighted assets actual, ratio | 10.03% | 12.04%
Tier 1 capital to risk-weighted assets actual, ratio | 0.1071 | 0.1204
Tier 1 capital to average assets actual, ratio | 0.0852 | 0.0859
Total capital to risk-weighted assets fully phased-in regulatory guidelines minimum, amount | $ 3,774,845 | $ 1,741,789
Common equity Tier 1 capital to risk-weighted assets fully phased-in regulatory guidelines minimum, amount | 2,516,563 | 1,161,193
Tier 1 capital to risk-weighted assets fully phased-in regulatory guidelines minimum, amount | 3,055,827 | 1,410,020
Tier 1 capital to average assets fully phased-in regulatory guidelines minimum, amount | $ 1,808,108 | $ 930,318
Total capital to risk-weighted assets fully phased-in regulatory guidelines minimum, ratio | 0.1050 | 0.1050
Common equity Tier 1 capital to risk-weighted assets fully phased-in regulatory guidelines minimum, ratio | 7.00% | 7.00%
Tier 1 capital to risk-weighted assets fully phased-in regulatory guidelines minimum, ratio | 0.0850 | 0.0850
Tier 1 capital to average assets fully phased-in regulatory guidelines minimum, ratio | 0.0400 | 0.0400
Total capital to risk-weighted assets well capitalized guidelines, amount | $ 3,595,090 | $ 1,658,847
Tier 1 capital to risk-weighted assets well capitalized guidelines, amount | $ 2,157,054 | $ 995,308
Total capital to risk-weighted assets well capitalized guidelines, ratio | 0.1000 | 0.1000
Tier 1 capital to risk-weighted assets well capitalized guidelines, ratio | 0.0600 | 0.0600
Old National Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total capital to risk-weighted assets actual, amount | $ 4,063,363 | $ 2,119,405
Common equity Tier 1 capital to risk-weighted assets actual, amount | 3,817,402 | 2,040,285
Tier 1 capital to risk-weighted assets actual, amount | 3,817,402 | 2,040,285
Tier 1 capital to average assets actual, amount | $ 3,817,402 | $ 2,040,285
Total capital to risk-weighted assets actual, ratio | 0.1135 | 0.1282
Common equity Tier 1 capital to risk-weighted assets actual, ratio | 10.66% | 12.34%
Tier 1 capital to risk-weighted assets actual, ratio | 0.1066 | 0.1234
Tier 1 capital to average assets actual, ratio | 0.0847 | 0.0881
Total capital to risk-weighted assets fully phased-in regulatory guidelines minimum, amount | $ 3,759,671 | $ 1,735,385
Common equity Tier 1 capital to risk-weighted assets fully phased-in regulatory guidelines minimum, amount | 2,506,448 | 1,156,923
Tier 1 capital to risk-weighted assets fully phased-in regulatory guidelines minimum, amount | 3,043,544 | 1,404,835
Tier 1 capital to average assets fully phased-in regulatory guidelines minimum, amount | $ 1,803,426 | $ 926,821
Total capital to risk-weighted assets fully phased-in regulatory guidelines minimum, ratio | 0.1050 | 0.1050
Common equity Tier 1 capital to risk-weighted assets fully phased-in regulatory guidelines minimum, ratio | 7.00% | 7.00%
Tier 1 capital to risk-weighted assets fully phased-in regulatory guidelines minimum, ratio | 0.0850 | 0.0850
Tier 1 capital to average assets fully phased-in regulatory guidelines minimum, ratio | 0.0400 | 0.0400
Total capital to risk-weighted assets well capitalized guidelines, amount | $ 3,580,639 | $ 1,652,748
Common equity Tier 1 capital to risk-weighted assets well capitalized guidelines, amount | 2,327,416 | 1,074,286
Tier 1 capital to risk-weighted assets well capitalized guidelines, amount | 2,864,512 | 1,322,198
Tier 1 capital to average assets well capitalized guidelines, amount | $ 2,254,282 | $ 1,158,526
Total capital to risk-weighted assets well capitalized guidelines, ratio | 0.1000 | 0.1000
Common equity Tier 1 capital to risk-weighted assets well capitalized guidelines, ratio | 6.50% | 6.50%
Tier 1 capital to risk-weighted assets well capitalized guidelines, ratio | 0.0800 | 0.0800
Tier 1 capital to average assets well capitalized guidelines, ratio | 0.0500 | 0.0500

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- Definition Amount of total capital as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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