NOTE 9 - REGULATORY CAPITAL REQUIREMENTS - Capital Requirements (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Total risk-based capital, actual, amount	$ 551,046	$ 460,416
Total risk-based capital, actual, ratio	12.04%	10.69%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 366,017	$ 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	$ 480,397	$ 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	$ 457,521	$ 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	$ 446,490	$ 420,569
Tier 1 risk-based capital, actual, ratio	9.76%	9.77%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 274,513	$ 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	$ 388,893	$ 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	$ 366,017	$ 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	$ 446,490	$ 420,569
Tier 1 leverage, actual, ratio	8.96%	8.87%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer	$ 199,304	$ 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	$ 199,304	$ 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	$ 249,130	$ 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	$ 408,735	$ 382,899
Common equity Tier 1, actual ratio	8.93%	8.89%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer	$ 205,884	$ 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	$ 320,265	$ 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	$ 297,389	$ 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	$ 171,919	$ 162,009
Total risk-based capital, actual, ratio	11.53%	11.38%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 119,322	$ 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	$ 156,610	$ 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	$ 149,152	$ 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	$ 158,453	$ 148,529
Tier 1 risk-based capital, actual, ratio	10.62%	10.43%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 89,491	$ 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	$ 126,779	$ 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	$ 119,322	$ 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	$ 158,453	$ 148,529
Tier 1 leverage, actual, ratio	9.39%	9.04%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer	$ 67,519	$ 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	$ 67,519	$ 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	$ 84,398	$ 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	$ 158,453	$ 148,529
Common equity Tier 1, actual ratio	10.62%	10.43%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer	$ 67,119	$ 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	$ 104,407	$ 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	$ 96,949	$ 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	$ 159,747	$ 146,292
Total risk-based capital, actual, ratio	11.56%	11.55%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 110,543	$ 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	$ 145,088	$ 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	$ 138,179	$ 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	$ 146,594	$ 133,982
Tier 1 risk-based capital, actual, ratio	10.61%	10.58%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 82,908	$ 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	$ 117,452	$ 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	$ 110,543	$ 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	$ 146,594	$ 133,982
Tier 1 leverage, actual, ratio	10.16%	9.98%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer	$ 57,716	$ 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	$ 57,716	$ 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	$ 72,145	$ 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	$ 146,594	$ 133,982
Common equity Tier 1, actual ratio	10.61%	10.58%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer	$ 62,181	$ 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	$ 96,725	$ 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	$ 89,816	$ 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	$ 85,269	$ 75,233
Total risk-based capital, actual, ratio	12.33%	11.24%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 55,307	$ 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	$ 72,591	$ 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	$ 69,134	$ 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	$ 78,770	$ 69,101
Tier 1 risk-based capital, actual, ratio	11.39%	10.32%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 41,481	$ 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	$ 58,764	$ 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	$ 55,307	$ 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	$ 78,770	$ 69,101
Tier 1 leverage, actual, ratio	10.03%	9.19%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer	$ 31,420	$ 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	$ 31,420	$ 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	$ 39,275	$ 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	$ 78,770	$ 69,101
Common equity Tier 1, actual ratio	11.39%	10.32%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer	$ 31,110	$ 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	$ 48,394	$ 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	$ 44,937	$ 43,523
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	$ 65,725
Total risk-based capital, actual, ratio	12.91%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 40,724
Total risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer	8.00%
Total risk-based capital for capital adequacy purposes, amount	$ 53,451
Total risk-based capital for capital adequacy purposes, ratio	10.50%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 50,906
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio	10.00%
Tier 1 risk-based capital, actual, amount	$ 58,978
Tier 1 risk-based capital, actual, ratio	11.59%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 30,543
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	$ 43,270
Tier 1 risk-based capital for capital adequacy purposes, ratio	8.50%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 40,724
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio	8.00%
Tier 1 leverage, actual, amount	$ 58,978
Tier 1 leverage, actual, ratio	10.58%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer	$ 22,306
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer	4.00%
Tier 1 leverage for capital adequacy purposes, amount	$ 22,306
Tier 1 leverage for capital adequacy purposes, ratio	4.00%
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount	$ 27,883
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio	5.00%
Common equity Tier 1, actual, amount	$ 58,978
Common equity Tier 1, actual ratio	11.59%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer	$ 22,907
Common equity Tier 1 for capital adequacy purposes, ratio, without capital conservation buffer	4.50%
Common equity Tier 1 for capital adequacy purposes, amount	$ 35,634
Common equity Tier 1 for capital adequacy purposes, ratio	7.00%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount	$ 33,089
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio	6.50%
SPRINGFIELD BANCSHARES, INC
Total risk-based capital, actual, amount	$ 52,293	$ 50,648
Total risk-based capital, actual, ratio	10.68%	10.89%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 39,163	$ 37,208
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	$ 51,401	$ 45,929
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	$ 48,954	$ 46,511
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	$ 46,232	$ 44,821
Tier 1 risk-based capital, actual, ratio	9.44%	9.64%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer	$ 29,372	$ 27,906
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	$ 41,611	$ 36,627
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	$ 39,163	$ 37,208
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio	8.00%	8.00%
Tier 1 leverage, actual, amount	$ 46,232	$ 44,821
Tier 1 leverage, actual, ratio	9.04%	8.93%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer	$ 20,466	$ 20,081
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer	4.00%	4.00%
Tier 1 leverage for capital adequacy purposes, amount	$ 20,466	$ 20,081
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	$ 25,582	$ 25,101
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio	5.00%	5.00%
Common equity Tier 1, actual, amount	$ 46,232	$ 44,821
Common equity Tier 1, actual ratio	9.44%	9.64%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer	$ 22,029	$ 20,930
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	$ 34,268	$ 29,650
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	$ 31,820	$ 30,232
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		$ 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		9.875%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount		$ 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		7.875%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount		$ 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		4.00%
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount		$ 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		6.375%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount		$ 30,289
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio		6.50%