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Note 8 - Regulatory Capital Requirements and Restrictions On Dividends (Details) - Capital Requirements - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014
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Parent Company [Member] |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Total risk-based capital actual amount |  | $ 267,743 | $ 204,376
Total risk-based capital actual ratio |  | 12.92% | 10.91%
Total risk-based capital for capital adequacy purposes amount |  | $ 165,750 | $ 149,876
Total risk-based capital for capital adequacy purposes ratio |  | 8.00% | 8.00%
Total risk-based capital to be well capitalized under prompt corrective action provisions amount |  | $ 207,188 |
Total risk-based capital to be well capitalized under prompt corrective action provisions ratio |  | 10.00% |
Total risk-based capital new Basel III minimums amount | [1] | $ 165,750 |
Total risk-based capital new Basel III minimums ratio | [1] | 8.00% |
Tier 1 risk-based capital actual amount |  | $ 241,548 | $ 178,364
Tier 1 risk-based capital actual ratio |  | 11.66% | 9.52%
Tier 1 risk-based capital for capital adequacy purposes amount |  | $ 124,313 | $ 74,938
Tier 1 risk-based capital for capital adequacy purposes ratio |  | 6.00% | 4.00%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions amount |  | $ 165,750 |
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions ratio |  | 8.00% |
Tier 1 risk-based capital new Basel III minimums amount | [1] | $ 124,313 |
Tier 1 risk-based capital new Basel III minimums ratio | [1] | 6.00% |
Tier 1 leverage actual amount |  | $ 241,548 | $ 178,364
Tier 1 leverage actual ratio |  | 9.62% | 7.62%
Tier 1 leverage for capital adequacy purposes amount |  | $ 100,436 | $ 93,658
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 |  | $ 125,545 |
Tier 1 leverage to be well capitalized under prompt corrective action provisions ratio |  | 5.00% |
Tier 1 leverage new Basel III minimums amount | [1] | $ 100,436 |
Tier 1 leverage new Basel III minimums ratio | [1] | 4.00% |
Common equity Tier 1 actual amount |  | $ 241,548 |
Common equity Tier 1 actual ratio |  | 9.97% |
Common equity Tier 1 capital adequacy purposes amount |  | $ 93,234 |
Common equity Tier 1 capital adequacy purposes ratio |  | 4.50% |
Common equity Tier 1 to be well capitalized under prompt corrective action provisions amount |  | $ 134,672 |
Common equity Tier 1 to be well capitalized under prompt corrective action provisions ratio |  | 6.50% |
Common equity Tier 1 new Basel III minimums amount | [1] | $ 93,234 |
Common equity Tier 1 new Basel III minimums ratio | [1] | 4.50% |
Quad City Bank and Trust Company [Member] |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Total risk-based capital actual amount |  | $ 130,828 | $ 104,869
Total risk-based capital actual ratio |  | 12.91% | 11.26%
Total risk-based capital for capital adequacy purposes amount |  | $ 81,107 | $ 74,495
Total risk-based capital for capital adequacy purposes ratio |  | 8.00% | 8.00%
Total risk-based capital to be well capitalized under prompt corrective action provisions amount |  | $ 101,384 | $ 93,119
Total risk-based capital to be well capitalized under prompt corrective action provisions ratio |  | 10.00% | 10.00%
Total risk-based capital new Basel III minimums amount | [1] | $ 81,107 |
Total risk-based capital new Basel III minimums ratio | [1] | 8.00% |
Tier 1 risk-based capital actual amount |  | $ 118,182 | $ 93,785
Tier 1 risk-based capital actual ratio |  | 11.66% | 10.07%
Tier 1 risk-based capital for capital adequacy purposes amount |  | $ 60,830 | $ 37,248
Tier 1 risk-based capital for capital adequacy purposes ratio |  | 6.00% | 4.00%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions amount |  | $ 81,107 | $ 55,872
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions ratio |  | 8.00% | 6.00%
Tier 1 risk-based capital new Basel III minimums amount | [1] | $ 60,830 |
Tier 1 risk-based capital new Basel III minimums ratio | [1] | 6.00% |
Tier 1 leverage actual amount |  | $ 118,182 | $ 93,785
Tier 1 leverage actual ratio |  | 8.86% | 7.10%
Tier 1 leverage for capital adequacy purposes amount |  | $ 53,347 | $ 52,817
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 |  | $ 66,683 | $ 66,021
Tier 1 leverage to be well capitalized under prompt corrective action provisions ratio |  | 5.00% | 5.00%
Tier 1 leverage new Basel III minimums amount | [1] | $ 53,347 |
Tier 1 leverage new Basel III minimums ratio | [1] | 4.00% |
Common equity Tier 1 actual amount |  | $ 118,182 |
Common equity Tier 1 actual ratio |  | 11.66% |
Common equity Tier 1 capital adequacy purposes amount |  | $ 45,623 |
Common equity Tier 1 capital adequacy purposes ratio |  | 4.50% |
Common equity Tier 1 to be well capitalized under prompt corrective action provisions amount |  | $ 65,900 |
Common equity Tier 1 to be well capitalized under prompt corrective action provisions ratio |  | 6.50% |
Common equity Tier 1 new Basel III minimums amount | [1] | $ 45,623 |
Common equity Tier 1 new Basel III minimums ratio | [1] | 4.50% |
Cedar Rapids Bank and Trust [Member] |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Total risk-based capital actual amount |  | $ 101,472 | $ 76,662
Total risk-based capital actual ratio |  | 13.73% | 11.54%
Total risk-based capital for capital adequacy purposes amount |  | $ 59,112 | $ 53,126
Total risk-based capital for capital adequacy purposes ratio |  | 8.00% | 8.00%
Total risk-based capital to be well capitalized under prompt corrective action provisions amount |  | $ 73,889 | $ 66,407
Total risk-based capital to be well capitalized under prompt corrective action provisions ratio |  | 10.00% | 10.00%
Total risk-based capital new Basel III minimums amount | [1] | $ 59,112 |
Total risk-based capital new Basel III minimums ratio | [1] | 8.00% |
Tier 1 risk-based capital actual amount |  | $ 92,223 | $ 68,772
Tier 1 risk-based capital actual ratio |  | 12.48% | 10.36%
Tier 1 risk-based capital for capital adequacy purposes amount |  | $ 44,334 | $ 26,563
Tier 1 risk-based capital for capital adequacy purposes ratio |  | 6.00% | 4.00%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions amount |  | $ 59,112 | $ 39,844
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions ratio |  | 8.00% | 6.00%
Tier 1 risk-based capital new Basel III minimums amount | [1] | $ 44,334 |
Tier 1 risk-based capital new Basel III minimums ratio | [1] | 6.00% |
Tier 1 leverage actual amount |  | $ 92,223 | $ 68,772
Tier 1 leverage actual ratio |  | 10.73% | 8.21%
Tier 1 leverage for capital adequacy purposes amount |  | $ 34,387 | $ 33,525
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 |  | $ 42,984 | $ 41,906
Tier 1 leverage to be well capitalized under prompt corrective action provisions ratio |  | 5.00% | 5.00%
Tier 1 leverage new Basel III minimums amount | [1] | $ 34,387 |
Tier 1 leverage new Basel III minimums ratio | [1] | 4.00% |
Common equity Tier 1 actual amount |  | $ 92,223 |
Common equity Tier 1 actual ratio |  | 12.48% |
Common equity Tier 1 capital adequacy purposes amount |  | $ 33,250 |
Common equity Tier 1 capital adequacy purposes ratio |  | 4.50% |
Common equity Tier 1 to be well capitalized under prompt corrective action provisions amount |  | $ 48,028 |
Common equity Tier 1 to be well capitalized under prompt corrective action provisions ratio |  | 6.50% |
Common equity Tier 1 new Basel III minimums amount | [1] | $ 33,250 |
Common equity Tier 1 new Basel III minimums ratio | [1] | 4.50% |
Rockford Bank and Trust [Member] |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Total risk-based capital actual amount |  | $ 37,885 | $ 35,906
Total risk-based capital actual ratio |  | 11.71% | 12.56%
Total risk-based capital for capital adequacy purposes amount |  | $ 25,891 | $ 22,875
Total risk-based capital for capital adequacy purposes ratio |  | 8.00% | 8.00%
Total risk-based capital to be well capitalized under prompt corrective action provisions amount |  | $ 32,363 | $ 28,594
Total risk-based capital to be well capitalized under prompt corrective action provisions ratio |  | 10.00% | 10.00%
Total risk-based capital new Basel III minimums amount | [1] | $ 25,891 |
Total risk-based capital new Basel III minimums ratio | [1] | 8.00% |
Tier 1 risk-based capital actual amount |  | $ 33,838 | $ 32,325
Tier 1 risk-based capital actual ratio |  | 10.46% | 11.30%
Tier 1 risk-based capital for capital adequacy purposes amount |  | $ 19,418 | $ 11,438
Tier 1 risk-based capital for capital adequacy purposes ratio |  | 6.00% | 4.00%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions amount |  | $ 25,891 | $ 17,156
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions ratio |  | 8.00% | 6.00%
Tier 1 risk-based capital new Basel III minimums amount | [1] | $ 19,418 |
Tier 1 risk-based capital new Basel III minimums ratio | [1] | 6.00% |
Tier 1 leverage actual amount |  | $ 33,838 | $ 32,325
Tier 1 leverage actual ratio |  | 9.42% | 9.16%
Tier 1 leverage for capital adequacy purposes amount |  | $ 14,369 | $ 14,112
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 |  | $ 17,961 | $ 17,640
Tier 1 leverage to be well capitalized under prompt corrective action provisions ratio |  | 5.00% | 5.00%
Tier 1 leverage new Basel III minimums amount | [1] | $ 14,369 |
Tier 1 leverage new Basel III minimums ratio | [1] | 4.00% |
Common equity Tier 1 actual amount |  | $ 33,838 |
Common equity Tier 1 actual ratio |  | 10.46% |
Common equity Tier 1 capital adequacy purposes amount |  | $ 14,564 |
Common equity Tier 1 capital adequacy purposes ratio |  | 4.50% |
Common equity Tier 1 to be well capitalized under prompt corrective action provisions amount |  | $ 21,036 |
Common equity Tier 1 to be well capitalized under prompt corrective action provisions ratio |  | 6.50% |
Common equity Tier 1 new Basel III minimums amount | [1] | $ 14,564 |
Common equity Tier 1 new Basel III minimums ratio | [1] | 4.50% |
[1] | The minimums under Basel III phase-in higher by .625% (the capital conservation buffer) annually until 2019. The fully phased-in mimimums are 10.5% (Total risk-based capital), 8.5% (Tier 1 risk-based capital), and 7.0% (Common equity Tier 1).

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- Definition The amount of Common equity Tier 1 required to be categorized as well capitalized under the regulatory framework for prompt corrective action. + 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 The amount of total capital as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998 + Details
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- Definition The minimum amount of Total Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + 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 under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958570-112826 + Details
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- Definition The amount of Total Capital required to be categorized as well as capitalized under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The minimum amount of Tier 1 Leverage Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The minimum amount of Tier 1 Leverage Capital for capital adequacy purposes divided by average assets as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958570-112826 + Details
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- Definition The amount of Tier 1 Leverage Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition Tier 1 Risk Based Capital as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 + 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 under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958570-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 + Details
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- Definition The amount of Tier 1 Risk Based Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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