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Note 4 - Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2015
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Three months ended |
|  | March 31, |
|  | 2015 |  |  | 2014 |
Net income |  | $ | 4,177,889 |  |  | $ | 3,889,215 |
Less: Preferred stock dividends |  |  | - |  |  |  | 708,008 |
Net income attributable to QCR Holdings, Inc. common stockholders |  | $ | 4,177,889 |  |  | $ | 3,181,207 |
Earnings per common share attributable to QCR Holdings, Inc. common stockholders |  |  |  |  |  |  |  |
Basic |  | $ | 0.52 |  |  | $ | 0.40 |
Diluted |  | $ | 0.52 |  |  | $ | 0.40 |
Weighted average common shares outstanding |  |  | 7,975,910 |  |  |  | 7,901,035 |
Weighted average common shares issuable upon exercise of stock options and under the employee stock purchase plan |  |  | 121,534 |  |  |  | 129,008 |
Weighted average common and common equivalent shares outstanding |  |  | 8,097,444 |  |  |  | 8,030,043 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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