v3.21.1

Regulatory Capital Requirements and Restrictions on Subsidiary Cash (Details) | Jul. 28, 2020 USD ($) | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
--- | --- | --- | ---
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Cash reserve deposit required and made |  | $ 0 | $ 0
Capital |  | $ 589,205,000 | $ 572,437,000
Capital to risk weighted assets |  | 0.1375 | 0.1341
Capital required for capital adequacy |  | $ 450,010,000 | $ 448,068,000
Capital required for capital adequacy to risk weighted assets |  | 0.1050 | 0.1050
Tier one risk based capital |  | $ 477,086,000 | $ 456,526,000
Tier one risk based capital to risk weighted assets |  | 0.1113 | 0.1070
Tier one risk based capital required for capital adequacy |  | $ 364,294,000 | $ 362,722,000
Tier one risk based capital required for capital adequacy to risk weighted assets |  | 0.0850 | 0.0850
Common equity tier one capital |  | $ 435,279,000 | $ 414,763,000
Common equity tier one capital to risk weighted assets |  | 10.16% | 9.72%
Common equity tier one capital required for capital adequacy |  | $ 300,006,000 | $ 298,712,000
Common equity tier one capital required for capital adequacy to risk weighted assets |  | 7.00% | 7.00%
Tier one leverage capital |  | $ 477,086,000 | $ 456,526,000
Tier one leverage capital to average assets |  | 0.0878 | 0.0850
Tier one leverage capital required for capital adequacy |  | $ 217,315,000 | $ 214,795,000
Tier one leverage capital required for capital adequacy to average assets |  | 0.0400 | 0.0400
Capital conservation buffer |  | 0.0250 | 0.0250
Subordinated debt |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Interest rate |  | 6.50% |
5.75% Fixed to floating subordinated notes | Subordinated debt |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Interest rate | 5.75% |  |
5.75% Fixed to floating subordinated notes | Subordinated debt | Private placement |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Sale of equity | $ 65,000,000.0 |  |
MidWestOne Bank |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Capital |  | $ 563,501,000 | $ 547,558,000
Capital to risk weighted assets |  | 0.1319 | 0.1289
Capital required for capital adequacy |  | $ 448,555,000 | $ 446,113,000
Capital required for capital adequacy to risk weighted assets |  | 0.1050 | 0.1050
Capital required to be well capitalized |  | $ 427,195,000 | $ 424,870,000
Capital required to be well capitalized to risk weighted assets |  | 0.1000 | 0.1000
Tier one risk based capital |  | $ 520,716,000 | $ 500,981,000
Tier one risk based capital to risk weighted assets |  | 0.1219 | 0.1179
Tier one risk based capital required for capital adequacy |  | $ 363,116,000 | $ 361,139,000
Tier one risk based capital required for capital adequacy to risk weighted assets |  | 0.0850 | 0.0850
Tier one risk based capital required to be well capitalized |  | $ 341,756,000 | $ 339,896,000
Tier one risk based capital required to be well capitalized to risk weighted assets |  | 0.0800 | 0.0800
Common equity tier one capital |  | $ 520,716,000 | $ 500,981,000
Common equity tier one capital to risk weighted assets |  | 12.19% | 11.79%
Common equity tier one capital required for capital adequacy |  | $ 299,037,000 | $ 297,409,000
Common equity tier one capital required for capital adequacy to risk weighted assets |  | 7.00% | 7.00%
Common equity tier one risk based capital required to be well capitalized |  | $ 277,677,000 | $ 276,165,000
Common equity tier one risk based capital required to be well capitalized to risk weighted assets |  | 6.50% | 6.50%
Tier one leverage capital |  | $ 520,716,000 | $ 500,981,000
Tier one leverage capital to average assets |  | 0.0960 | 0.0935
Tier one leverage capital required for capital adequacy |  | $ 216,913,000 | $ 214,251,000
Tier one leverage capital required for capital adequacy to average assets |  | 0.0400 | 0.0400
Tier one leverage capital required to be well capitalized |  | $ 271,142,000 | $ 271,992,000
Tier one leverage capital required to be well capitalized to average assets |  | 0.0500 | 0.0500

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