XML 164 R134.htm IDEA: XBRL DOCUMENT
v3.20.1

Note 17 - Regulatory Capital Requirements and Restrictions on Dividends - Capital Requirements (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Total risk-based capital, actual, amount |  | $ 581,234 | $ 460,416
Total risk-based capital, actual, ratio |  | 13.33% | 10.69%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 348,937 | $ 344,551
Total risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer |  | 8.00% | 8.00%
Total risk-based capital for capital adequacy purposes, amount |  | $ 457,980 | $ 425,305
Total risk-based capital for capital adequacy purposes, ratio | [1] | 10.50% | 9.875%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 436,171 | $ 430,689
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 |  | $ 481,702 | $ 420,569
Tier 1 risk-based capital, actual, ratio |  | 11.04% | 9.77%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 261,703 | $ 258,413
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 |  | $ 370,746 | $ 339,168
Tier 1 risk-based capital for capital adequacy purposes, ratio | [1] | 8.50% | 7.875%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 348,937 | $ 344,551
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio |  | 8.00% | 8.00%
Tier 1 leverage, actual, amount |  | $ 481,702 | $ 420,569
Tier 1 leverage, actual, ratio |  | 9.53% | 8.87%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer |  | $ 202,207 | $ 189,858
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer |  | 4.00% | 4.00%
Tier 1 leverage for capital adequacy purposes, amount |  | $ 202,207 | $ 189,858
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 | [1] | $ 252,758 | $ 237,322
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio |  | 5.00% | 5.00%
Common equity Tier 1, actual, amount |  | $ 443,864 | $ 382,899
Common equity Tier 1, actual ratio |  | 10.18% | 8.89%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer |  | $ 196,277 | $ 193,810
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 |  | $ 305,320 | $ 274,564
Common equity Tier 1 for capital adequacy purposes, ratio | [1] | 7.00% | 6.375%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount | [1] | $ 283,511 | $ 279,948
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio |  | 6.50% | 6.50%
QCBT |  |  |
Total risk-based capital, actual, amount |  | $ 183,855 | $ 162,009
Total risk-based capital, actual, ratio |  | 11.83% | 11.38%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 124,362 | $ 113,900
Total risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer |  | 8.00% | 8.00%
Total risk-based capital for capital adequacy purposes, amount |  | $ 163,225 | $ 140,596
Total risk-based capital for capital adequacy purposes, ratio | [1] | 10.50% | 9.875%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 155,452 | $ 142,376
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 |  | $ 170,137 | $ 148,529
Tier 1 risk-based capital, actual, ratio |  | 10.94% | 10.43%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 93,271 | $ 85,425
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 |  | $ 132,134 | $ 112,121
Tier 1 risk-based capital for capital adequacy purposes, ratio | [1] | 8.50% | 7.875%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 124,362 | $ 113,900
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio |  | 8.00% | 8.00%
Tier 1 leverage, actual, amount |  | $ 170,137 | $ 148,529
Tier 1 leverage, actual, ratio |  | 9.94% | 9.04%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer |  | $ 68,479 | $ 65,744
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer |  | 4.00% | 4.00%
Tier 1 leverage for capital adequacy purposes, amount |  | $ 68,479 | $ 65,744
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 | [1] | $ 85,598 | $ 82,180
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio |  | 5.00% | 5.00%
Common equity Tier 1, actual, amount |  | $ 170,137 | $ 148,529
Common equity Tier 1, actual ratio |  | 10.94% | 10.43%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer |  | $ 69,953 | $ 64,069
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 |  | $ 108,817 | $ 90,764
Common equity Tier 1 for capital adequacy purposes, ratio | [1] | 7.00% | 6.375%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount | [1] | $ 101,044 | $ 92,544
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio |  | 6.50% | 6.50%
CRBT |  |  |
Total risk-based capital, actual, amount |  | $ 175,498 | $ 146,292
Total risk-based capital, actual, ratio |  | 11.90% | 11.55%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 117,953 | $ 101,310
Total risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer |  | 8.00% | 8.00%
Total risk-based capital for capital adequacy purposes, amount |  | $ 154,813 | $ 125,054
Total risk-based capital for capital adequacy purposes, ratio | [1] | 10.50% | 9.875%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 147,441 | $ 126,637
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 |  | $ 162,127 | $ 133,982
Tier 1 risk-based capital, actual, ratio |  | 11.00% | 10.58%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 88,465 | $ 75,982
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 |  | $ 125,325 | $ 99,727
Tier 1 risk-based capital for capital adequacy purposes, ratio | [1] | 8.50% | 7.875%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 117,953 | $ 101,310
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio |  | 8.00% | 8.00%
Tier 1 leverage, actual, amount |  | $ 162,127 | $ 133,982
Tier 1 leverage, actual, ratio |  | 10.41% | 9.98%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer |  | $ 62,286 | $ 53,682
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer |  | 4.00% | 4.00%
Tier 1 leverage for capital adequacy purposes, amount |  | $ 62,286 | $ 53,682
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 | [1] | $ 77,857 | $ 67,103
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio |  | 5.00% | 5.00%
Common equity Tier 1, actual, amount |  | $ 162,127 | $ 133,982
Common equity Tier 1, actual ratio |  | 11.00% | 10.58%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer |  | $ 66,349 | $ 56,987
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 |  | $ 103,209 | $ 80,731
Common equity Tier 1 for capital adequacy purposes, ratio | [1] | 7.00% | 6.375%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount | [1] | $ 95,837 | $ 82,314
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio |  | 6.50% | 6.50%
CSB |  |  |
Total risk-based capital, actual, amount |  | $ 92,095 | $ 75,233
Total risk-based capital, actual, ratio |  | 12.32% | 11.24%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 59,813 | $ 53,567
Total risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer |  | 8.00% | 8.00%
Total risk-based capital for capital adequacy purposes, amount |  | $ 78,504 | $ 66,122
Total risk-based capital for capital adequacy purposes, ratio | [1] | 10.50% | 9.875%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 74,766 | $ 66,959
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 |  | $ 85,437 | $ 69,101
Tier 1 risk-based capital, actual, ratio |  | 11.43% | 10.32%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 44,860 | $ 40,175
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 |  | $ 63,551 | $ 52,730
Tier 1 risk-based capital for capital adequacy purposes, ratio | [1] | 8.50% | 7.875%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 59,813 | $ 53,567
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio |  | 8.00% | 8.00%
Tier 1 leverage, actual, amount |  | $ 85,437 | $ 69,101
Tier 1 leverage, actual, ratio |  | 10.39% | 9.19%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer |  | $ 32,902 | $ 30,070
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer |  | 4.00% | 4.00%
Tier 1 leverage for capital adequacy purposes, amount |  | $ 32,902 | $ 30,070
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 | [1] | $ 41,128 | $ 37,588
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio |  | 5.00% | 5.00%
Common equity Tier 1, actual, amount |  | $ 85,437 | $ 69,101
Common equity Tier 1, actual ratio |  | 11.43% | 10.32%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer |  | $ 33,645 | $ 30,131
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 |  | $ 52,336 | $ 42,686
Common equity Tier 1 for capital adequacy purposes, ratio | [1] | 7.00% | 6.375%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount | [1] | $ 48,598 | $ 43,523
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio |  | 6.50% | 6.50%
Springfield First Community Bank [Member] |  |  |
Total risk-based capital, actual, amount |  | $ 71,074 | $ 57,051
Total risk-based capital, actual, ratio |  | 12.72% | 12.24%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 44,704 | $ 37,278
Total risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer |  | 8.00% | 8.00%
Total risk-based capital for capital adequacy purposes, amount |  | $ 58,674 | $ 46,016
Total risk-based capital for capital adequacy purposes, ratio | [1] | 10.50% | 9.875%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 55,880 | $ 46,598
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 |  | $ 63,956 | $ 51,279
Tier 1 risk-based capital, actual, ratio |  | 11.45% | 11.00%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  | $ 33,528 | $ 27,959
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 |  | $ 47,498 | $ 36,696
Tier 1 risk-based capital for capital adequacy purposes, ratio | [1] | 8.50% | 7.875%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] | $ 44,704 | $ 37,278
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio |  | 8.00% | 8.00%
Tier 1 leverage, actual, amount |  | $ 63,956 | $ 51,279
Tier 1 leverage, actual, ratio |  | 9.70% | 9.39%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer |  | $ 26,379 | $ 21,849
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer |  | 4.00% | 4.00%
Tier 1 leverage for capital adequacy purposes, amount |  | $ 26,379 | $ 21,849
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 | [1] | $ 32,974 | $ 27,312
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio |  | 5.00% | 5.00%
Common equity Tier 1, actual, amount |  | $ 63,956 | $ 51,279
Common equity Tier 1, actual ratio |  | 11.45% | 11.00%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer |  | $ 25,146 | $ 20,969
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 |  | $ 39,116 | $ 29,706
Common equity Tier 1 for capital adequacy purposes, ratio | [1] | 7.00% | 6.375%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount | [1] | $ 36,322 | $ 30,289
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 |  |  | $ 50,648
Total risk-based capital, actual, ratio |  |  | 10.89%
Total risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  |  | $ 37,208
Total risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer |  |  | 8.00%
Total risk-based capital for capital adequacy purposes, amount |  |  | $ 45,929
Total risk-based capital for capital adequacy purposes, ratio | [1] |  | 9.875%
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] |  | $ 46,511
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio |  |  | 10.00%
Tier 1 risk-based capital, actual, amount |  |  | $ 44,821
Tier 1 risk-based capital, actual, ratio |  |  | 9.64%
Tier 1 risk-based capital for capital adequacy purposes, amount, without capital conservation buffer |  |  | $ 27,906
Tier 1 risk-based capital for capital adequacy purposes, ratio, without capital conservation buffer |  |  | 6.00%
Tier 1 risk-based capital for capital adequacy purposes, amount |  |  | $ 36,627
Tier 1 risk-based capital for capital adequacy purposes, ratio | [1] |  | 7.875%
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount | [1] |  | $ 37,208
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio |  |  | 8.00%
Tier 1 leverage, actual, amount |  |  | $ 44,821
Tier 1 leverage, actual, ratio |  |  | 8.93%
Tier 1 leverage for capital adequacy purposes, amount, without capital conservation buffer |  |  | $ 20,081
Tier 1 leverage for capital adequacy purposes, ratio, without capital conservation buffer |  |  | 4.00%
Tier 1 leverage for capital adequacy purposes, amount |  |  | $ 20,081
Tier 1 leverage for capital adequacy purposes, ratio | [1] |  | 4.00%
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount | [1] |  | $ 25,101
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio |  |  | 5.00%
Common equity Tier 1, actual, amount |  |  | $ 44,821
Common equity Tier 1, actual ratio |  |  | 9.64%
Common equity Tier 1 for capital adequacy purposes, amount, without capital conservation buffer |  |  | $ 20,930
Common equity Tier 1 for capital adequacy purposes, ratio, without capital conservation buffer |  |  | 4.50%
Common equity Tier 1 for capital adequacy purposes, amount |  |  | $ 29,650
Common equity Tier 1 for capital adequacy purposes, ratio | [1] |  | 6.375%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount | [1] |  | $ 30,232
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio |  |  | 6.50%
[1] | December 31, 2019 minimums reflect the fully phased-in ratios (including the capital conservation buffer).

X
- Definition The minimum amount of Total Capital required for capital adequacy purposes, without the capital conservation buffer. + References No definition available. + Details
Name: | qcrh_CapitalRequiredForCapitalAdequacyExcludingCapitalConservationBuffer
Namespace Prefix: | qcrh_
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, 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 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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + 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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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=117337116&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_SpringfieldFirstCommunityBankMember
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: |