NOTE 10 - REGULATORY CAPITAL REQUIREMENTS - Capital Requirements (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Total risk-based capital, actual, amount	$ 567,977	$ 460,416
Total risk-based capital, actual, ratio	12.22%	10.69%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 371,904	$ 344,551
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	$ 488,124	$ 425,305
Total risk-based capital for capital adequacy purposes, ratio	10.50%	9.875%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 464,880	$ 430,689
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	$ 461,899	$ 420,569
Tier 1 risk-based capital, actual, ratio	9.94%	9.77%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 278,928	$ 258,413
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	$ 395,148	$ 339,168
Tier 1 risk-based capital for capital adequacy purposes, ratio	8.50%	7.875%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 371,904	$ 344,551
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio	8.00%	8.00%
Tier 1 leverage, actual, amount	$ 461,899	$ 420,569
Tier 1 leverage, actual, ratio	9.02%	8.87%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer	$ 204,868	$ 189,858
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer	4.00%	4.00%
Tier 1 leverage for capital adequacy purposes, amount	$ 204,868	$ 189,858
Tier 1 leverage for capital adequacy purposes, ratio	4.00%	4.00%
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount	$ 256,085	$ 237,322
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio	5.00%	5.00%
Common equity Tier 1, actual, amount	$ 424,102	$ 382,899
Common equity Tier 1, actual ratio	9.12%	8.89%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer	$ 209,196	$ 193,810
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	$ 325,416	$ 274,564
Common equity Tier 1 for capital adequacy purposes, ratio	7.00%	6.375%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount	$ 302,172	$ 279,948
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	$ 177,834	$ 162,009
Total risk-based capital, actual, ratio	11.72%	11.38%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 121,345	$ 113,900
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	$ 159,265	$ 140,596
Total risk-based capital for capital adequacy purposes, ratio	10.50%	9.875%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 151,681	$ 142,376
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	$ 163,998	$ 148,529
Tier 1 risk-based capital, actual, ratio	10.81%	10.43%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 91,009	$ 85,425
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	$ 128,929	$ 112,121
Tier 1 risk-based capital for capital adequacy purposes, ratio	8.50%	7.875%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 121,345	$ 113,900
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio	8.00%	8.00%
Tier 1 leverage, actual, amount	$ 163,998	$ 148,529
Tier 1 leverage, actual, ratio	9.85%	9.04%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer	$ 66,604	$ 65,744
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer	4.00%	4.00%
Tier 1 leverage for capital adequacy purposes, amount	$ 66,604	$ 65,744
Tier 1 leverage for capital adequacy purposes, ratio	4.00%	4.00%
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount	$ 83,255	$ 82,180
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio	5.00%	5.00%
Common equity Tier 1, actual, amount	$ 163,998	$ 148,529
Common equity Tier 1, actual ratio	10.81%	10.43%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer	$ 68,257	$ 64,069
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	$ 106,177	$ 90,764
Common equity Tier 1 for capital adequacy purposes, ratio	7.00%	6.375%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount	$ 98,593	$ 92,544
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	$ 168,158	$ 146,292
Total risk-based capital, actual, ratio	11.64%	11.55%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 115,524	$ 101,310
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	$ 151,625	$ 125,054
Total risk-based capital for capital adequacy purposes, ratio	10.50%	9.875%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 144,405	$ 126,637
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	$ 154,769	$ 133,982
Tier 1 risk-based capital, actual, ratio	10.72%	10.58%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 86,643	$ 75,982
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	$ 122,744	$ 99,727
Tier 1 risk-based capital for capital adequacy purposes, ratio	8.50%	7.875%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 115,524	$ 101,310
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio	8.00%	8.00%
Tier 1 leverage, actual, amount	$ 154,769	$ 133,982
Tier 1 leverage, actual, ratio	9.99%	9.98%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer	$ 61,993	$ 53,682
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer	4.00%	4.00%
Tier 1 leverage for capital adequacy purposes, amount	$ 61,993	$ 53,682
Tier 1 leverage for capital adequacy purposes, ratio	4.00%	4.00%
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount	$ 77,491	$ 67,103
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio	5.00%	5.00%
Common equity Tier 1, actual, amount	$ 154,769	$ 133,982
Common equity Tier 1, actual ratio	10.72%	10.58%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer	$ 64,982	$ 56,987
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	$ 101,083	$ 80,731
Common equity Tier 1 for capital adequacy purposes, ratio	7.00%	6.375%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount	$ 93,863	$ 82,314
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	$ 89,088	$ 75,233
Total risk-based capital, actual, ratio	12.92%	11.24%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 55,147	$ 53,567
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	$ 72,380	$ 66,122
Total risk-based capital for capital adequacy purposes, ratio	10.50%	9.875%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 68,933	$ 66,959
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	$ 82,399	$ 69,101
Tier 1 risk-based capital, actual, ratio	11.95%	10.32%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 41,360	$ 40,175
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	$ 58,593	$ 52,730
Tier 1 risk-based capital for capital adequacy purposes, ratio	8.50%	7.875%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 55,147	$ 53,567
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio	8.00%	8.00%
Tier 1 leverage, actual, amount	$ 82,399	$ 69,101
Tier 1 leverage, actual, ratio	10.35%	9.19%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer	$ 31,846	$ 30,070
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer	4.00%	4.00%
Tier 1 leverage for capital adequacy purposes, amount	$ 31,846	$ 30,070
Tier 1 leverage for capital adequacy purposes, ratio	4.00%	4.00%
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount	$ 39,808	$ 37,588
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio	5.00%	5.00%
Common equity Tier 1, actual, amount	$ 82,399	$ 69,101
Common equity Tier 1, actual ratio	11.95%	10.32%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer	$ 31,020	$ 30,131
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	$ 48,253	$ 42,686
Common equity Tier 1 for capital adequacy purposes, ratio	7.00%	6.375%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount	$ 44,807	$ 43,523
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio	6.50%	6.50%
Springfield First Community Bank [Member]
Total risk-based capital, actual, amount	$ 68,371	$ 57,051
Total risk-based capital, actual, ratio	13.16%	12.24%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 41,561	$ 37,278
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	$ 54,549	$ 46,016
Total risk-based capital for capital adequacy purposes, ratio	10.50%	9.875%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 51,951	$ 46,598
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	$ 61,328	$ 51,279
Tier 1 risk-based capital, actual, ratio	11.80%	11.00%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 31,171	$ 27,959
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	$ 44,159	$ 36,696
Tier 1 risk-based capital for capital adequacy purposes, ratio	8.50%	7.875%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 41,561	$ 37,278
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio	8.00%	8.00%
Tier 1 leverage, actual, amount	$ 61,328	$ 51,279
Tier 1 leverage, actual, ratio	9.67%	9.39%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer	$ 25,375	$ 21,849
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer	4.00%	4.00%
Tier 1 leverage for capital adequacy purposes, amount	$ 25,375	$ 21,849
Tier 1 leverage for capital adequacy purposes, ratio	4.00%	4.00%
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount	$ 31,719	$ 27,312
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio	5.00%	5.00%
Common equity Tier 1, actual, amount	$ 61,328	$ 51,279
Common equity Tier 1, actual ratio	11.80%	11.00%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer	$ 23,378	$ 20,969
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	$ 36,366	$ 29,706
Common equity Tier 1 for capital adequacy purposes, ratio	7.00%	6.375%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount	$ 33,768	$ 30,289
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
Total risk-based capital, actual, ratio		10.89%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer		$ 37,208
Total risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer		8.00%
Total risk-based capital for capital adequacy purposes, amount		$ 45,929
Total risk-based capital for capital adequacy purposes, ratio		9.875%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount		$ 46,511
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio		10.00%
Tier 1 risk-based capital, actual, amount		$ 44,821
Tier 1 risk-based capital, actual, ratio		9.64%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer		$ 27,906
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		$ 36,627
Tier 1 risk-based capital for capital adequacy purposes, ratio		7.875%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount		$ 37,208
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio		8.00%
Tier 1 leverage, actual, amount		$ 44,821
Tier 1 leverage, actual, ratio		8.93%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer		$ 20,081
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer		4.00%
Tier 1 leverage for capital adequacy purposes, amount		$ 20,081
Tier 1 leverage for capital adequacy purposes, ratio		4.00%
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount		$ 25,101
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio		5.00%
Common equity Tier 1, actual, amount		$ 44,821
Common equity Tier 1, actual ratio		9.64%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer		$ 20,930
Common equity Tier 1 for capital adequacy purposes, ratio, without capital conservation buffer		4.50%
Common equity Tier 1 for capital adequacy purposes, amount		$ 29,650
Common equity Tier 1 for capital adequacy purposes, ratio		6.375%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount		$ 30,232
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio		6.50%