XML 73 R58.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Note 2 - Acquisitions - Changes in Accretable Yield (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Balance at the beginning of the period | $ (9,309,920) |
Discount added at acquisition | (2,443,891) | (12,193,588)
Accretion recognized | 5,282,604 | 2,883,668
Balance at the end of the period | (6,471,207) | (9,309,920)
Performing Financial Instruments [Member] |  |
Balance at the beginning of the period | (9,115,614) |
Discount added at acquisition | (2,223,989) | (11,916,009)
Accretion recognized | 5,059,528 | 2,800,395
Balance at the end of the period | (6,280,075) | (9,115,614)
Guaranty Bank and Trust Company [Member] |  |
Balance at the beginning of the period |  |
Discount added at acquisition | (2,443,891) |
Accretion recognized | 80,906 |
Balance at the end of the period | (2,362,985) |
Guaranty Bank and Trust Company [Member] | Performing Financial Instruments [Member] |  |
Balance at the beginning of the period |  |
Discount added at acquisition | (2,223,989) |
Accretion recognized | 26,836 |
Balance at the end of the period | (2,197,153) |
Community State Bank [Member] |  |
Balance at the beginning of the period | (9,309,920) |
Discount added at acquisition |  | (12,193,588)
Accretion recognized | 5,201,698 | 2,883,668
Balance at the end of the period | (4,108,222) | (9,309,920)
Community State Bank [Member] | Performing Financial Instruments [Member] |  |
Balance at the beginning of the period | (9,115,614) |
Discount added at acquisition |  | (11,916,009)
Accretion recognized | 5,032,692 | 2,800,395
Balance at the end of the period | (4,082,922) | (9,115,614)
Receivables Acquired with Deteriorated Credit Quality [Member] |  |
Balance at the beginning of the period | (194,306) |
Discount added at acquisition | (219,902) | (277,579)
Accretion recognized | 223,076 | 83,273
Balance at the end of the period | (191,132) | (194,306)
Receivables Acquired with Deteriorated Credit Quality [Member] | Guaranty Bank and Trust Company [Member] |  |
Balance at the beginning of the period |  |
Discount added at acquisition | (219,902) |
Accretion recognized | 54,070 |
Balance at the end of the period | (165,832) |
Receivables Acquired with Deteriorated Credit Quality [Member] | Community State Bank [Member] |  |
Balance at the beginning of the period | (194,306) |
Discount added at acquisition |  | (277,579)
Accretion recognized | 169,006 | 83,273
Balance at the end of the period | $ (25,300) | $ (194,306)

X
- Definition The aggregate excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan for loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82894507&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 + Details
Name: | us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYield
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Current period recognition due to accretion of the excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan for loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82894507&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 + Details
Name: | us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldAccretion
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Increases in the aggregate excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan due to the acquisition of similar loans accounted for as debt securities during the period. This relates to loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82894507&loc=d3e13503-111538 + Details
Name: | us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldAdditions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentPerformanceStatusAxis=us-gaap_PerformingFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=qcrh_GuarantyBankAndTrustCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_ReceivablesAcquiredWithDeterioratedCreditQualityAxis=us-gaap_ReceivablesAcquiredWithDeterioratedCreditQualityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |