Note 16 - Regulatory Capital Requirements and Restrictions on Dividends (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]

	Actual					For Capital Adequacy Purposes With Capital Conservation Buffer*						To Be Well Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio			Amount			Ratio			Amount			Ratio
As of December 31, 2016:
Company:
Total risk-based capital	$	327,440		11.56	%	$	244,289	>		8.625	%	$	283,233	>		10.0	%
Tier 1 risk-based capital		296,366		10.46	%		187,642	>		6.625			226,587	>		8.0
Tier 1 leverage		296,366		9.10	%		130,229	>		4.000			162,787	>		5.0
Common equity Tier 1		266,419		9.41	%		145,157	>		5.125			184,102	>		6.5
Quad City Bank & Trust:
Total risk-based capital	$	142,990		12.27	%	$	100,494	>		8.625	%	$	116,515	>		10.0	%
Tier 1 risk-based capital		129,524		11.12	%		77,191	>		6.625			93,212	>		8.0
Tier 1 leverage		129,524		9.18	%		56,445	>		4.000			70,556	>		5.0
Common equity Tier 1		129,524		11.12	%		59,714	>		5.125			75,735	>		6.5
Cedar Rapids Bank & Trust:
Total risk-based capital	$	106,791		12.82	%	$	71,828	>		8.625	%	$	83,279	>		10.0	%
Tier 1 risk-based capital		96,369		11.57	%		55,173	>		6.625			66,623	>		8.0
Tier 1 leverage		96,369		10.69	%		36,061	>		4.000			45,076	>		5.0
Common equity Tier 1		96,369		11.57	%		42,681	>		5.125			54,132	>		6.5
Community State Bank:
Total risk-based capital	$	68,216		13.81	%	$	42,609	>		8.625	%	$	49,402	>		10.0	%
Tier 1 risk-based capital		66,746		13.51	%		32,729	>		6.625			39,522	>		8.0
Tier 1 leverage		66,746		11.75	%		22,726	>		4.000			28,408	>		5.0
Common equity Tier 1		66,746		13.51	%		25,319	>		5.125			32,111	>		6.5
Rockford Bank & Trust:
Total risk-based capital	$	42,007		12.26	%	$	29,551	>		8.625	%	$	34,262	>		10.0	%
Tier 1 risk-based capital		37,716		11.01	%		22,699	>		6.625			27,410	>		8.0
Tier 1 leverage		37,716		9.57	%		15,772	>		4.000			19,716	>		5.0
Common equity Tier 1		37,716		11.01	%		17,559	>		5.125			22,270	>		6.5

	Actual					For Capital Adequacy Purposes*						To Be Well Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio			Amount			Ratio			Amount			Ratio
As of December 31, 2015:
Company:
Total risk-based capital	$	280,273		13.11	%	$	170,969	>		8.0	%	$	213,711	>		10.0	%
Tier 1 risk-based capital		253,891		11.88	%		128,227	>		6.0			170,969	>		8.0
Tier 1 leverage		253,891		9.75	%		104,163	>		4.0			130,203	>		5.0
Common equity Tier 1		220,800		10.33	%		96,170	>		4.5			138,912	>		6.5
Quad City Bank & Trust:
Total risk-based capital	$	135,477		12.50	%	$	86,726	>		8.0	%	$	108,407	>		10.0	%
Tier 1 risk-based capital		123,498		11.39	%		65,044	>		6.0			86,726	>		8.0
Tier 1 leverage		123,498		8.87	%		55,718	>		4.0			69,648	>		5.0
Common equity Tier 1		123,498		11.39	%		48,783	>		4.5			70,465	>		6.5
Cedar Rapids Bank & Trust:
Total risk-based capital	$	105,285		14.39	%	$	58,537	>		8.0	%	$	73,172	>		10.0	%
Tier 1 risk-based capital		96,118		13.14	%		43,903	>		6.0			58,537	>		8.0
Tier 1 leverage		96,118		10.96	%		35,079	>		4.0			43,848	>		5.0
Common equity Tier 1		96,118		13.14	%		32,927	>		4.5			47,562	>		6.5
Rockford Bank & Trust:
Total risk-based capital	$	38,544		11.96	%	$	25,772	>		8.0	%	$	32,216	>		10.0	%
Tier 1 risk-based capital		34,514		10.71	%		19,329	>		6.0			25,772	>		8.0
Tier 1 leverage		34,514		9.59	%		14,401	>		4.0			18,001	>		5.0
Common equity Tier 1		34,514		10.71	%		14,497	>		4.5			20,940	>		6.5