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Note 13 - Junior Subordinated Debentures - Trust Preferred Securities (Details) - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Feb. 12, 2019 | Dec. 31, 2020 | Dec. 31, 2019
Aggregate principal amount |  | $ 40,210 | $ 40,210
Interest rate (as a percent) |  | 2.48% | 4.18%
London Interbank Offered Rate (LIBOR) |  |  |
Variable interest rate (as a percent) | 282.00% |  |
Trust Preferred Securities [Member] | Qcr Holdings Statutory Trust I I Member |  |  |
Date issued |  | February 2004 |
Aggregate principal amount |  | $ 10,310 | $ 10,310
Interest rate (as a percent) |  | 3.10% | 4.79%
Trust Preferred Securities [Member] | Qcr Holdings Statutory Trust I I Member | London Interbank Offered Rate (LIBOR) |  |  |
Variable interest rate (as a percent) |  | 2.85% |
Trust Preferred Securities [Member] | QCR Holdings Statutory Trust III [Member] |  |  |
Date issued |  | February 2004 |
Aggregate principal amount |  | $ 8,248 | $ 8,248
Interest rate (as a percent) |  | 3.10% | 4.79%
Trust Preferred Securities [Member] | QCR Holdings Statutory Trust III [Member] | London Interbank Offered Rate (LIBOR) |  |  |
Variable interest rate (as a percent) |  | 2.85% |
Trust Preferred Securities [Member] | QCR Holdings Statutory Trust V [Member] |  |  |
Date issued |  | February 2006 |
Aggregate principal amount |  | $ 10,310 | $ 10,310
Interest rate (as a percent) |  | 1.79% | 3.54%
Trust Preferred Securities [Member] | QCR Holdings Statutory Trust V [Member] | London Interbank Offered Rate (LIBOR) |  |  |
Variable interest rate (as a percent) |  | 1.55% |
Trust Preferred Securities [Member] | Community National Statutory Trust II [Member] |  |  |
Date issued |  | September 2004 |
Aggregate principal amount |  | $ 3,093 | $ 3,093
Interest rate (as a percent) |  | 2.41% | 4.08%
Trust Preferred Securities [Member] | Community National Statutory Trust II [Member] | London Interbank Offered Rate (LIBOR) |  |  |
Variable interest rate (as a percent) |  | 2.17% |
Trust Preferred Securities [Member] | Community National Statutory Trust III [Member] |  |  |
Date issued |  | March 2007 |
Aggregate principal amount |  | $ 3,609 | $ 3,609
Interest rate (as a percent) |  | 1.97% | 3.64%
Trust Preferred Securities [Member] | Community National Statutory Trust III [Member] | London Interbank Offered Rate (LIBOR) |  |  |
Variable interest rate (as a percent) |  | 1.75% |
Trust Preferred Securities [Member] | Guaranty Bankshares Statutory Trust I [Member] |  |  |
Date issued |  | May 2005 |
Aggregate principal amount |  | $ 4,640 | $ 4,640
Interest rate (as a percent) |  | 1.97% | 3.64%
Trust Preferred Securities [Member] | Guaranty Bankshares Statutory Trust I [Member] | London Interbank Offered Rate (LIBOR) |  |  |
Variable interest rate (as a percent) |  | 1.75% |

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- Definition Trust preferred securities date issued. + References No definition available. + Details
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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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