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Note 16 - Regulatory Capital Requirements and Restrictions on Dividends - Capital Requirements (Details) - USD ($) | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Total risk-based capital, actual, amount |  | $ 460,416 | $ 383,282
Total risk-based capital, actual, ratio |  | 10.69% | 11.15%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 344,551 | $ 275,090
Total risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer |  | 8.00% | 8.00%
Total risk-based capital for capital adequacy purposes, amount |  | $ 425,305 | $ 318,073
Total risk-based capital for capital adequacy purposes, ratio | [1] | 9.875% | 9.25%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 430,689 | $ 343,862
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio |  | 10.00% | 10.00%
Tier 1 risk-based capital, actual, amount |  | $ 420,569 | $ 348,530
Tier 1 risk-based capital, actual, ratio |  | 9.77% | 10.14%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 258,413 | $ 206,317
Tier 1 risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer |  | 6.00% | 6.00%
Tier 1 risk-based capital for capital adequacy purposes, amount |  | $ 339,168 | $ 249,300
Tier 1 risk-based capital for capital adequacy purposes, ratio | [1] | 7.875% | 7.25%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 344,551 | $ 275,090
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio |  | 8.00% | 8.00%
Tier 1 leverage, actual, amount |  | $ 420,569 | $ 348,530
Tier 1 leverage, actual, ratio |  | 8.87% | 8.98%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer |  | $ 189,858 | $ 155,256
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer |  | 4.00% | 4.00%
Tier 1 leverage for capital adequacy purposes, amount |  | $ 189,858 | $ 155,256
Tier 1 leverage for capital adequacy purposes, ratio | [1] | 4.00% | 4.00%
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount | [1] | $ 237,322 | $ 194,070
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio |  | 5.00% | 5.00%
Common equity Tier 1, actual, amount |  | $ 382,899 | $ 313,012
Common equity Tier 1, actual ratio |  | 8.89% | 9.10%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer |  | $ 193,810 | $ 154,738
Common equity Tier 1 for capital adequacy purposes, ratio, without capital conservation buffer |  | 4.50% | 4.50%
Common equity Tier 1 for capital adequacy purposes, amount |  | $ 274,564 | $ 197,721
Common equity Tier 1 for capital adequacy purposes, ratio | [1] | 6.375% | 5.75%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount | [1] | $ 279,948 | $ 223,510
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio |  | 6.50% | 6.50%
Quad City Bank and Trust Company [Member] |  |  |
Total risk-based capital, actual, amount |  | $ 162,009 | $ 160,112
Total risk-based capital, actual, ratio |  | 11.38% | 12.35%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 113,900 | $ 103,711
Total risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer |  | 8.00% | 8.00%
Total risk-based capital for capital adequacy purposes, amount |  | $ 140,596 | $ 119,916
Total risk-based capital for capital adequacy purposes, ratio | [1] | 9.875% | 9.25%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 142,376 | $ 129,639
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio |  | 10.00% | 10.00%
Tier 1 risk-based capital, actual, amount |  | $ 148,529 | $ 147,472
Tier 1 risk-based capital, actual, ratio |  | 10.43% | 11.38%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 85,425 | $ 77,783
Tier 1 risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer |  | 6.00% | 6.00%
Tier 1 risk-based capital for capital adequacy purposes, amount |  | $ 112,121 | $ 93,988
Tier 1 risk-based capital for capital adequacy purposes, ratio | [1] | 7.875% | 7.25%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 113,900 | $ 103,711
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio |  | 8.00% | 8.00%
Tier 1 leverage, actual, amount |  | $ 148,529 | $ 147,472
Tier 1 leverage, actual, ratio |  | 9.04% | 9.52%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer |  | $ 65,744 | $ 61,985
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer |  | 4.00% | 4.00%
Tier 1 leverage for capital adequacy purposes, amount |  | $ 65,744 | $ 61,985
Tier 1 leverage for capital adequacy purposes, ratio | [1] | 4.00% | 4.00%
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount | [1] | $ 82,180 | $ 77,481
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio |  | 5.00% | 5.00%
Common equity Tier 1, actual, amount |  | $ 148,529 | $ 147,472
Common equity Tier 1, actual ratio |  | 10.43% | 11.38%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer |  | $ 64,069 | $ 58,337
Common equity Tier 1 for capital adequacy purposes, ratio, without capital conservation buffer |  | 4.50% | 4.50%
Common equity Tier 1 for capital adequacy purposes, amount |  | $ 90,764 | $ 74,542
Common equity Tier 1 for capital adequacy purposes, ratio | [1] | 6.375% | 5.75%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount | [1] | $ 92,544 | $ 84,265
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio |  | 6.50% | 6.50%
Cedar Rapids Bank and Trust [Member] |  |  |
Total risk-based capital, actual, amount |  | $ 146,292 | $ 138,492
Total risk-based capital, actual, ratio |  | 11.55% | 11.88%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 101,310 | $ 93,272
Total risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer |  | 8.00% | 8.00%
Total risk-based capital for capital adequacy purposes, amount |  | $ 125,054 | $ 107,846
Total risk-based capital for capital adequacy purposes, ratio | [1] | 9.875% | 9.25%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 126,637 | $ 116,590
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio |  | 10.00% | 10.00%
Tier 1 risk-based capital, actual, amount |  | $ 133,982 | $ 126,601
Tier 1 risk-based capital, actual, ratio |  | 10.58% | 10.86%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 75,982 | $ 69,954
Tier 1 risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer |  | 6.00% | 6.00%
Tier 1 risk-based capital for capital adequacy purposes, amount |  | $ 99,727 | $ 84,528
Tier 1 risk-based capital for capital adequacy purposes, ratio | [1] | 7.875% | 7.25%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 101,310 | $ 93,272
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio |  | 8.00% | 8.00%
Tier 1 leverage, actual, amount |  | $ 133,982 | $ 126,601
Tier 1 leverage, actual, ratio |  | 9.98% | 11.68%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer |  | $ 53,682 | $ 43,348
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer |  | 4.00% | 4.00%
Tier 1 leverage for capital adequacy purposes, amount |  | $ 53,682 | $ 43,348
Tier 1 leverage for capital adequacy purposes, ratio | [1] | 4.00% | 4.00%
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount | [1] | $ 67,103 | $ 54,185
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio |  | 5.00% | 5.00%
Common equity Tier 1, actual, amount |  | $ 133,982 | $ 126,601
Common equity Tier 1, actual ratio |  | 10.58% | 10.86%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer |  | $ 56,987 | $ 52,465
Common equity Tier 1 for capital adequacy purposes, ratio, without capital conservation buffer |  | 4.50% | 4.50%
Common equity Tier 1 for capital adequacy purposes, amount |  | $ 80,731 | $ 67,039
Common equity Tier 1 for capital adequacy purposes, ratio | [1] | 6.375% | 5.75%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount | [1] | $ 82,314 | $ 75,783
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio |  | 6.50% | 6.50%
Community State Bank [Member] |  |  |
Total risk-based capital, actual, amount |  | $ 75,233 | $ 66,271
Total risk-based capital, actual, ratio |  | 11.24% | 11.71%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 53,567 | $ 45,293
Total risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer |  | 8.00% | 8.00%
Total risk-based capital for capital adequacy purposes, amount |  | $ 66,122 | $ 52,370
Total risk-based capital for capital adequacy purposes, ratio | [1] | 9.875% | 9.25%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 66,959 | $ 56,616
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio |  | 10.00% | 10.00%
Tier 1 risk-based capital, actual, amount |  | $ 69,101 | $ 61,941
Tier 1 risk-based capital, actual, ratio |  | 10.32% | 10.94%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 40,175 | $ 33,970
Tier 1 risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer |  | 6.00% | 6.00%
Tier 1 risk-based capital for capital adequacy purposes, amount |  | $ 52,730 | $ 41,047
Tier 1 risk-based capital for capital adequacy purposes, ratio | [1] | 7.875% | 7.25%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 53,567 | $ 45,293
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio |  | 8.00% | 8.00%
Tier 1 leverage, actual, amount |  | $ 69,101 | $ 61,941
Tier 1 leverage, actual, ratio |  | 9.19% | 9.77%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer |  | $ 30,070 | $ 25,354
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer |  | 4.00% | 4.00%
Tier 1 leverage for capital adequacy purposes, amount |  | $ 30,070 | $ 25,354
Tier 1 leverage for capital adequacy purposes, ratio | [1] | 4.00% | 4.00%
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount | [1] | $ 37,588 | $ 31,693
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio |  | 5.00% | 5.00%
Common equity Tier 1, actual, amount |  | $ 69,101 | $ 61,941
Common equity Tier 1, actual ratio |  | 10.32% | 10.94%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer |  | $ 30,131 | $ 25,477
Common equity Tier 1 for capital adequacy purposes, ratio, without capital conservation buffer |  | 4.50% | 4.50%
Common equity Tier 1 for capital adequacy purposes, amount |  | $ 42,686 | $ 32,554
Common equity Tier 1 for capital adequacy purposes, ratio | [1] | 6.375% | 5.75%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount | [1] | $ 43,523 | $ 36,801
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio |  | 6.50% | 6.50%
Rockford Bank and Trust [Member] |  |  |
Total risk-based capital, actual, amount |  | $ 50,648 | $ 45,684
Total risk-based capital, actual, ratio |  | 10.89% | 11.28%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 37,208 | $ 32,413
Total risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer |  | 8.00% | 8.00%
Total risk-based capital for capital adequacy purposes, amount |  | $ 45,929 | $ 37,477
Total risk-based capital for capital adequacy purposes, ratio | [1] | 9.875% | 9.25%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 46,511 | $ 40,516
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio |  | 10.00% | 10.00%
Tier 1 risk-based capital, actual, amount |  | $ 44,821 | $ 40,615
Tier 1 risk-based capital, actual, ratio |  | 9.64% | 10.02%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 27,906 | $ 24,310
Tier 1 risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer |  | 6.00% | 6.00%
Tier 1 risk-based capital for capital adequacy purposes, amount |  | $ 36,627 | $ 29,374
Tier 1 risk-based capital for capital adequacy purposes, ratio | [1] | 7.875% | 7.25%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 37,208 | $ 32,413
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio |  | 8.00% | 8.00%
Tier 1 leverage, actual, amount |  | $ 44,821 | $ 40,615
Tier 1 leverage, actual, ratio |  | 8.93% | 8.94%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer |  | $ 20,081 | $ 18,177
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer |  | 4.00% | 4.00%
Tier 1 leverage for capital adequacy purposes, amount |  | $ 20,081 | $ 18,177
Tier 1 leverage for capital adequacy purposes, ratio | [1] | 4.00% | 4.00%
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount | [1] | $ 25,101 | $ 22,721
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio |  | 5.00% | 5.00%
Common equity Tier 1, actual, amount |  | $ 44,821 | $ 40,615
Common equity Tier 1, actual ratio |  | 9.64% | 10.02%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer |  | $ 20,930 | $ 18,232
Common equity Tier 1 for capital adequacy purposes, ratio, without capital conservation buffer |  | 4.50% | 4.50%
Common equity Tier 1 for capital adequacy purposes, amount |  | $ 29,650 | $ 23,297
Common equity Tier 1 for capital adequacy purposes, ratio | [1] | 6.375% | 5.75%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount | [1] | $ 30,232 | $ 26,335
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio |  | 6.50% | 6.50%
SPRINGFIELD BANCSHARES, INC |  |  |
Total risk-based capital, actual, amount |  | $ 57,051 |
Total risk-based capital, actual, ratio |  | 12.24% |
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 37,278 |
Total risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer |  | 8.00% |
Total risk-based capital for capital adequacy purposes, amount |  | $ 46,016 |
Total risk-based capital for capital adequacy purposes, ratio | [1] | 9.875% |
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 46,598 |
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio |  | 10.00% |
Tier 1 risk-based capital, actual, amount |  | $ 51,279 |
Tier 1 risk-based capital, actual, ratio |  | 11.00% |
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 27,959 |
Tier 1 risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer |  | 6.00% |
Tier 1 risk-based capital for capital adequacy purposes, amount |  | $ 36,696 |
Tier 1 risk-based capital for capital adequacy purposes, ratio | [1] | 7.875% |
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 37,278 |
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio |  | 8.00% |
Tier 1 leverage, actual, amount |  | $ 51,279 |
Tier 1 leverage, actual, ratio |  | 9.39% |
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer |  | $ 21,849 |
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer |  | 4.00% |
Tier 1 leverage for capital adequacy purposes, amount |  | $ 21,849 |
Tier 1 leverage for capital adequacy purposes, ratio | [1] | 4.00% |
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount | [1] | $ 27,312 |
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio |  | 5.00% |
Common equity Tier 1, actual, amount |  | $ 51,279 |
Common equity Tier 1, actual ratio |  | 11.00% |
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer |  | $ 20,969 |
Common equity Tier 1 for capital adequacy purposes, ratio, without capital conservation buffer |  | 4.50% |
Common equity Tier 1 for capital adequacy purposes, amount |  | $ 29,706 |
Common equity Tier 1 for capital adequacy purposes, ratio | [1] | 6.375% |
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount | [1] | $ 30,289 |
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio |  | 6.50% |
[1] | The minimums under Basel III increase by .625% (the capital conservation buffer) for all ratios other than Tier 1 leverage annually until 2019.

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- Definition The minimum amount of Total Capital required for capital adequacy purposes, without the capital conservation buffer. + References No definition available. + Details
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- Definition The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes, without capital conservation buffer. + References No definition available. + Details
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- Definition Ratio of Common equity Tier 1 required for capital adequacy purposes as defined in the regulations. + References No definition available. + Details
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- Definition Ratio of Common equity Tier 1 required for capital adequacy purposes, considering without capital conservation buffer. + References No definition available. + Details
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- Definition The ratio Tier 1 Leverage Capital required to be categorized as well capitalized as defined in the regulatory framework for prompt corrective action. + References No definition available. + Details
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- Definition Amount of Common Equity Tier 1 Risk-based Capital required to be categorized as adequately capitalized, considering without capital conservation buffer. + References No definition available. + Details
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- Definition The minimum amount of Tier 1 Leverage Capital for capital adequacy purposes divided by average assets, considering without capital conservation. + References No definition available. + Details
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- Definition The minimum amount of Tier 1 Leverage Capital required for capital adequacy purposes, considering without capital conservation buffer. + References No definition available. + Details
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- Definition The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes, considering without capital conservation buffer. + References No definition available. + Details
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