XML 59 R48.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Note 7 - Regulatory Capital Requirements and Restrictions on Dividends - Capital Requirements (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Total risk-based capital, actual, amount |  | $ 395,160 | $ 383,282
Total risk-based capital, actual, ratio |  | 11.25% | 11.15%
Total risk-based capital for capital adquacy purposes, amount, without capital conservation buffer |  | $ 281,109 | $ 275,090
Total risk-based capital for capital adquacy purposes, ratio, without capital conservation buffer |  | 8.00% | 8.00%
Total risk-based capital for capital adquacy purposes, amount | [1] | $ 346,994 | $ 318,073
Total risk-based capital for capital adquacy purposes, ratio | [1] | 9.875% | 9.25%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount |  | $ 351,386 | $ 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 |  | $ 358,627 | $ 348,530
Tier 1 risk-based capital, actual, ratio |  | 10.21% | 10.14%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 210,832 | $ 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 | [1] | $ 276,717 | $ 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 |  | $ 281,109 | $ 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 |  | $ 358,627 | $ 348,530
Tier 1 leverage, actual, ratio |  | 9.08% | 8.98%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer |  | $ 157,993 | $ 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 | [1] | $ 157,993 | $ 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 |  | $ 197,491 | $ 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 |  | $ 321,093 | $ 313,012
Common equity Tier 1, actual ratio |  | 9.14% | 9.10%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer |  | $ 158,124 | $ 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 | [1] | $ 224,009 | $ 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 |  | $ 228,401 | $ 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 |  | $ 160,996 | $ 160,112
Total risk-based capital, actual, ratio |  | 12.32% | 12.35%
Total risk-based capital for capital adquacy purposes, amount, without capital conservation buffer |  | $ 104,544 | $ 103,711
Total risk-based capital for capital adquacy purposes, ratio, without capital conservation buffer |  | 8.00% | 8.00%
Total risk-based capital for capital adquacy purposes, amount | [1] | $ 129,047 | $ 119,916
Total risk-based capital for capital adquacy purposes, ratio | [1] | 9.875% | 9.25%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount |  | $ 130,680 | $ 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 |  | $ 147,618 | $ 147,472
Tier 1 risk-based capital, actual, ratio |  | 11.30% | 11.38%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 78,408 | $ 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 | [1] | $ 102,911 | $ 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 |  | $ 104,544 | $ 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 |  | $ 147,618 | $ 147,472
Tier 1 leverage, actual, ratio |  | 9.63% | 9.52%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer |  | $ 61,343 | $ 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 | [1] | $ 61,343 | $ 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 |  | $ 76,678 | $ 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 |  | $ 147,618 | $ 147,472
Common equity Tier 1, actual ratio |  | 11.30% | 11.38%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer |  | $ 58,806 | $ 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 | [1] | $ 83,309 | $ 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 |  | $ 84,942 | $ 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 |  | $ 142,034 | $ 138,492
Total risk-based capital, actual, ratio |  | 11.96% | 11.88%
Total risk-based capital for capital adquacy purposes, amount, without capital conservation buffer |  | $ 94,998 | $ 93,272
Total risk-based capital for capital adquacy purposes, ratio, without capital conservation buffer |  | 8.00% | 8.00%
Total risk-based capital for capital adquacy purposes, amount | [1] | $ 117,264 | $ 107,846
Total risk-based capital for capital adquacy purposes, ratio | [1] | 9.875% | 9.25%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount |  | $ 118,748 | $ 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 |  | $ 129,507 | $ 126,601
Tier 1 risk-based capital, actual, ratio |  | 10.91% | 10.86%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 71,249 | $ 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 | [1] | $ 93,514 | $ 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 |  | $ 94,998 | $ 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 |  | $ 129,507 | $ 126,601
Tier 1 leverage, actual, ratio |  | 9.87% | 11.68%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer |  | $ 52,483 | $ 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 | [1] | $ 52,483 | $ 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 |  | $ 65,603 | $ 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 |  | $ 129,507 | $ 126,601
Common equity Tier 1, actual ratio |  | 10.91% | 10.86%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer |  | $ 53,437 | $ 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 | [1] | $ 75,702 | $ 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 |  | $ 77,186 | $ 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 |  | $ 67,996 | $ 66,271
Total risk-based capital, actual, ratio |  | 11.39% | 11.71%
Total risk-based capital for capital adquacy purposes, amount, without capital conservation buffer |  | $ 47,738 | $ 45,293
Total risk-based capital for capital adquacy purposes, ratio, without capital conservation buffer |  | 8.00% | 8.00%
Total risk-based capital for capital adquacy purposes, amount | [1] | $ 58,926 | $ 52,370
Total risk-based capital for capital adquacy purposes, ratio | [1] | 9.875% | 9.25%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount |  | $ 59,672 | $ 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 |  | $ 63,105 | $ 61,941
Tier 1 risk-based capital, actual, ratio |  | 10.58% | 10.94%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 35,803 | $ 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 | [1] | $ 46,992 | $ 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 |  | $ 47,738 | $ 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 |  | $ 63,105 | $ 61,941
Tier 1 leverage, actual, ratio |  | 9.35% | 9.77%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer |  | $ 27,010 | $ 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 | [1] | $ 27,010 | $ 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 |  | $ 33,763 | $ 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 |  | $ 63,105 | $ 61,941
Common equity Tier 1, actual ratio |  | 10.58% | 10.94%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer |  | $ 26,853 | $ 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 | [1] | $ 38,041 | $ 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 |  | $ 38,787 | $ 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 |  | $ 46,567 | $ 45,684
Total risk-based capital, actual, ratio |  | 11.07% | 11.28%
Total risk-based capital for capital adquacy purposes, amount, without capital conservation buffer |  | $ 33,644 | $ 32,413
Total risk-based capital for capital adquacy purposes, ratio, without capital conservation buffer |  | 8.00% | 8.00%
Total risk-based capital for capital adquacy purposes, amount | [1] | $ 41,530 | $ 37,477
Total risk-based capital for capital adquacy purposes, ratio | [1] | 9.875% | 9.25%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount |  | $ 42,055 | $ 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 |  | $ 41,305 | $ 40,615
Tier 1 risk-based capital, actual, ratio |  | 9.82% | 10.02%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 25,233 | $ 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 | [1] | $ 33,119 | $ 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 |  | $ 33,644 | $ 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 |  | $ 41,305 | $ 40,615
Tier 1 leverage, actual, ratio |  | 8.93% | 8.94%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer |  | $ 18,498 | $ 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 | [1] | $ 18,498 | $ 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 |  | $ 23,123 | $ 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 |  | $ 41,305 | $ 40,615
Common equity Tier 1, actual ratio |  | 9.82% | 10.02%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer |  | $ 18,925 | $ 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 | [1] | $ 26,810 | $ 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 |  | $ 27,336 | $ 26,335
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio |  | 6.50% | 6.50%
[1] | The minimums under Basel III increase by .625% (the capital conservation buffer) annually until 2019. The fully phased-in minimums are 10.5% (Total risk-based capital), 8.5% (Tier 1 risk-based capital), and 7.0% (Common equity Tier 1).

X
- Definition The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes, considering without capital conservation buffer. + References No definition available. + Details
Name: | qcrh_CapitalRequiredForCapitalAdequacyToRiskWeightedAssetsWithoutCapitalConservationBuffer
Namespace Prefix: | qcrh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The minimum amount of Total Capital required for capital adequacy purposes, considering without the capital conservation buffer. + References No definition available. + Details
Name: | qcrh_CapitalRequiredForCapitalAdequacyWithoutCapitalConservationBuffer
Namespace Prefix: | qcrh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Ratio of Common equity Tier 1 required for capital adequacy purposes as defined in the regulations. + References No definition available. + Details
Name: | qcrh_CommonEquityTier1CapitalAdequacyPurposesRatio
Namespace Prefix: | qcrh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Ratio of Common equity Tier 1 required for capital adequacy purposes, considering without capital conservation buffer. + References No definition available. + Details
Name: | qcrh_CommonEquityTier1CapitalAdequacyPurposesRatioWithoutCapitalConservationBuffer
Namespace Prefix: | qcrh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- 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
Name: | qcrh_CommonEquityTier1ToBeWellCapitalizedUnderPromptCorrectiveActionProvisionsRatio
Namespace Prefix: | qcrh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- 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
Name: | qcrh_CommonEquityTierOneCapitalRequiredForCapitalAdequacyWithoutCapitalConservationBuffer
Namespace Prefix: | qcrh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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
Name: | qcrh_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssetsWithoutCapitalConservationBuffer
Namespace Prefix: | qcrh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The minimum amount of Tier 1 Leverage Capital required for capital adequacy purposes, considering without capital conservation buffer. + References No definition available. + Details
Name: | qcrh_TierOneLeverageCapitalRequiredForCapitalAdequacyWithoutCapitalConservationBuffer
Namespace Prefix: | qcrh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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
Name: | qcrh_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssetsWithoutCapitalConservationBuffer
Namespace Prefix: | qcrh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The minimum amount of Tier 1 Risk Based Capital required for capital adequacy purposes, considering without capital conservation buffer. + References No definition available. + Details
Name: | qcrh_TierOneRiskBasedCapitalRequiredForCapitalAdequacyWithoutCapitalConservationBuffer
Namespace Prefix: | qcrh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of total capital as defined in the regulations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 + Details
Name: | us-gaap_Capital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum amount of Total Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
Name: | us-gaap_CapitalRequiredForCapitalAdequacy
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958570-112826 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 + Details
Name: | us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
Name: | us-gaap_CapitalRequiredToBeWellCapitalized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The Total risk based capital ratio (total capital divided by risk weighted assets) required to be categorized as "well capitalized", in the regulatory framework for prompt corrective action. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
Name: | us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total Capital divided by risk weighted assets as defined in the regulations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 + Details
Name: | us-gaap_CapitalToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of Common Equity Tier One Risk-based Capital, as defined by regulatory framework. + References No definition available. + Details
Name: | us-gaap_CommonEquityTierOneCapital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percentage of Common Equity Tier One Risk-based Capital to total risk-weighted assets, as defined by regulatory framework. + References No definition available. + Details
Name: | us-gaap_CommonEquityTierOneCapitalRatio
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of Common Equity Tier 1 Risk-based Capital required to be categorized as adequately capitalized under regulatory framework for prompt corrective action. + References No definition available. + Details
Name: | us-gaap_CommonEquityTierOneCapitalRequiredForCapitalAdequacy
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of Common Equity Tier 1 Risk-based Capital required to be categorized as well-capitalized under regulatory framework for prompt corrective action. + References No definition available. + Details
Name: | us-gaap_CommonEquityTierOneCapitalRequiredToBeWellCapitalized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Tier 1 Leverage Capital as defined in the regulations. Also called Core Capital. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 + Details
Name: | us-gaap_TierOneLeverageCapital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958570-112826 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of Tier 1 Leverage Capital required to be categorized as well capitalized divided by average assets as defined in the regulatory framework for prompt corrective action. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Tier 1 Leverage Capital divided by average assets as defined in the regulations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 + Details
Name: | us-gaap_TierOneLeverageCapitalToAverageAssets
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Tier 1 Risk Based Capital as defined in the regulations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 + Details
Name: | us-gaap_TierOneRiskBasedCapital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum amount of Tier 1 Risk Based Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 + Details
Name: | us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958570-112826 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 + Details
Name: | us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The Tier 1 capital ratio (Tier 1 capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Tier 1 capital divided by risk weighted assets as defined by regulations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=qcrh_QuadCityBankAndTrustCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=qcrh_CedarRapidsBankAndTrustMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=qcrh_CommunityStateBankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=qcrh_RockfordBankAndTrustMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |