XML 67 R92.htm IDEA: XBRL DOCUMENT
v3.20.1

Note 6 - Goodwill and Intangibles - Core Deposit Intangibles by Reportable Segment (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | --- | ---
Segment Reporting Information [Line Items] |  |  |  |
Core deposit intangible | $ 14,970 | $ 17,450 | $ 9,079 |
Core Deposits [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Core deposit intangible | 13,466 | 15,595 | 9,079 | $ 7,381
CRBT | Core Deposits [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Core deposit intangible | 2,684 | 3,186 | 3,694 |
CSB | Core Deposits [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Core deposit intangible | 3,980 | 4,675 | $ 5,385 |
SFC Bank |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Core deposit intangible | 6,802 | 7,735 |  |
SFC Bank | Core Deposits [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Core deposit intangible | $ 6,802 | $ 7,734 |  |

X
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CoreDepositsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | us-gaap_SubsegmentsAxis=qcrh_SfcBankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |