XML 140 R115.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Note 16 - Regulatory Capital Requirements and Restrictions on Dividends (Details) - Capital Requirements (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Company [Member] |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total risk-based capital | $ 204,376 us-gaap_Capital / dei_LegalEntityAxis = qcrh_CompanyMember | $ 217,011 us-gaap_Capital / dei_LegalEntityAxis = qcrh_CompanyMember
Total risk-based capital ratio | 10.91%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_CompanyMember | 12.87%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_CompanyMember
Total risk-based capital required for capital adequacy purposes | 149,876 us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_CompanyMember | 134,935 us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_CompanyMember
Total risk-based capital required for capital adequacy purposes ratio | 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_CompanyMember | 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_CompanyMember
Tier 1 risk-based capital | 178,364 us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = qcrh_CompanyMember | 193,044 us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = qcrh_CompanyMember
Tier 1 risk-based capital ratio | 9.52%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_CompanyMember | 11.45%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_CompanyMember
Tier 1 risk-based capital required for capital adequacy purposes | 74,938 us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_CompanyMember | 67,468 us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_CompanyMember
Tier 1 risk-based capital required for capital adequacy purposes ratio | 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_CompanyMember | 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_CompanyMember
Tier 1 leverage | 178,364 us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = qcrh_CompanyMember | 193,044 us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = qcrh_CompanyMember
Tier 1 leverage ratio | 7.62%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = qcrh_CompanyMember | 7.96%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = qcrh_CompanyMember
Tier 1 leverage required for capital adequacy purposes | 93,658 us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_CompanyMember | 97,029 us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_CompanyMember
Tier 1 leverage required for capital adequacy purposes ratio | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = qcrh_CompanyMember | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = qcrh_CompanyMember
Quad City Bank and Trust Company [Member] |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total risk-based capital | 104,869 us-gaap_Capital / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember | 101,168 us-gaap_Capital / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember
Total risk-based capital ratio | 11.26%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember | 12.25%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember
Total risk-based capital required for capital adequacy purposes | 74,495 us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember | 66,049 us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember
Total risk-based capital required for capital adequacy purposes ratio | 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember | 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember
Total risk-based capital required to be well capitalized under prompt corrective action provisions | 93,119 us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember | 82,562 us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember
Total risk-based capital required to be well capitalized under prompt corrective action provisions ratio | 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember | 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember
Tier 1 risk-based capital | 93,785 us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember | 91,820 us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember
Tier 1 risk-based capital ratio | 10.07%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember | 11.12%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember
Tier 1 risk-based capital required for capital adequacy purposes | 37,248 us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember | 33,025 us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember
Tier 1 risk-based capital required for capital adequacy purposes ratio | 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember | 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember
Tier 1 risk-based capital required to be well capitalized under prompt corrective action provisions | 55,872 us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember | 49,537 us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember
Tier 1 risk-based capital required to be well capitalized under prompt corrective action provisions ratio | 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember | 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember
Tier 1 leverage | 93,785 us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember | 91,820 us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember
Tier 1 leverage ratio | 7.10%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember | 7.13%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember
Tier 1 leverage required for capital adequacy purposes | 52,817 us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember | 51,527 us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember
Tier 1 leverage required for capital adequacy purposes ratio | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember
Tier 1 leverage to be well capitalized under prompt corrective action provisions | 66,021 us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember | 64,408 us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember
Tier 1 leverage required to be well capitalized under prompt corrective action provisions ratio | 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember | 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = qcrh_QuadCityBankAndTrustCompanyMember
Cedar Rapids Bank and Trust [Member] |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total risk-based capital | 76,662 us-gaap_Capital / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember | 74,912 us-gaap_Capital / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember
Total risk-based capital ratio | 11.54%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember | 12.54%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember
Total risk-based capital required for capital adequacy purposes | 53,126 us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember | 47,808 us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember
Total risk-based capital required for capital adequacy purposes ratio | 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember | 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember
Total risk-based capital required to be well capitalized under prompt corrective action provisions | 66,407 us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember | 59,760 us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember
Total risk-based capital required to be well capitalized under prompt corrective action provisions ratio | 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember | 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember
Tier 1 risk-based capital | 68,772 us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember | 67,432 us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember
Tier 1 risk-based capital ratio | 10.36%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember | 11.28%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember
Tier 1 risk-based capital required for capital adequacy purposes | 26,563 us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember | 23,904 us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember
Tier 1 risk-based capital required for capital adequacy purposes ratio | 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember | 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember
Tier 1 risk-based capital required to be well capitalized under prompt corrective action provisions | 39,844 us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember | 35,856 us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember
Tier 1 risk-based capital required to be well capitalized under prompt corrective action provisions ratio | 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember | 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember
Tier 1 leverage | 68,772 us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember | 67,432 us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember
Tier 1 leverage ratio | 8.21%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember | 8.78%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember
Tier 1 leverage required for capital adequacy purposes | 33,525 us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember | 30,736 us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember
Tier 1 leverage required for capital adequacy purposes ratio | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember
Tier 1 leverage to be well capitalized under prompt corrective action provisions | 41,906 us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember | 38,420 us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember
Tier 1 leverage required to be well capitalized under prompt corrective action provisions ratio | 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember | 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = qcrh_CedarRapidsBankAndTrustMember
Rockford Bank and Trust [Member] |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total risk-based capital | 35,906 us-gaap_Capital / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember | 38,778 us-gaap_Capital / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember
Total risk-based capital ratio | 12.56%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember | 14.59%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember
Total risk-based capital required for capital adequacy purposes | 22,875 us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember | 21,263 us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember
Total risk-based capital required for capital adequacy purposes ratio | 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember | 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember
Total risk-based capital required to be well capitalized under prompt corrective action provisions | 28,594 us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember | 26,579 us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember
Total risk-based capital required to be well capitalized under prompt corrective action provisions ratio | 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember | 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember
Tier 1 risk-based capital | 32,325 us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember | 35,449 us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember
Tier 1 risk-based capital ratio | 11.30%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember | 13.34%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember
Tier 1 risk-based capital required for capital adequacy purposes | 11,438 us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember | 10,631 us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember
Tier 1 risk-based capital required for capital adequacy purposes ratio | 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember | 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember
Tier 1 risk-based capital required to be well capitalized under prompt corrective action provisions | 17,156 us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember | 15,947 us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember
Tier 1 risk-based capital required to be well capitalized under prompt corrective action provisions ratio | 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember | 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember
Tier 1 leverage | 32,325 us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember | 35,449 us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember
Tier 1 leverage ratio | 9.16%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember | 10.54%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember
Tier 1 leverage required for capital adequacy purposes | 14,112 us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember | 13,459 us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember
Tier 1 leverage required for capital adequacy purposes ratio | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember
Tier 1 leverage to be well capitalized under prompt corrective action provisions | $ 17,640 us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember | $ 16,824 us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember
Tier 1 leverage required to be well capitalized under prompt corrective action provisions ratio | 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember | 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = qcrh_RockfordBankAndTrustMember

X
- 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
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://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
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://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 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
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://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
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://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
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://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
Name: | us-gaap_CapitalToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tier 1 Leverage Capital as defined in the regulations. Also called Core Capital. + 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
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://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
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://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 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
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://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
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://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
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://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
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://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
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://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
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://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 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
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://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
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://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
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://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
Name: | us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

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

X
- Details
Name: | dei_LegalEntityAxis=qcrh_QuadCityBankAndTrustCompanyMember
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: |