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Unaudited Quarterly Financial Data | 12 Months Ended
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Dec. 31, 2013
Unaudited Quarterly Financial Data [Abstract] |
Unaudited Quarterly Financial Data | (15) Unaudited Quarterly Financial Data Summarized unaudited quarterly financial data for 2013 and 2012 is as follows (amounts in thousands except per share data):
|  | Quarter |
|  | First |  |  | Second |  |  | Third |  |  | Fourth |
2013 |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  | $ | 179,229 |  |  |  | 226,205 |  |  |  | 252,385 |  |  |  | 223,782 |
Operating income (loss) |  |  | (4,858 | ) |  |  | 36,432 |  |  |  | 62,511 |  |  |  | 26,596 |
Income (loss) before income taxes |  |  | (9,373 | ) |  |  | 31,583 |  |  |  | 57,670 |  |  |  | 21,614 |
Net income (loss) |  |  | (5,689 | ) |  |  | 19,149 |  |  |  | 35,605 |  |  |  | 13,004 |
Net income (loss) attributable to Air Methods Corporation and subsidiaries |  |  | (5,689 | ) |  |  | 19,149 |  |  |  | 35,605 |  |  |  | 13,274 |
Basic income (loss) per common share |  |  | (.15 | ) |  |  | .49 |  |  |  | .91 |  |  |  | .29 |
Diluted income (loss) per common share |  |  | (.15 | ) |  |  | .49 |  |  |  | .91 |  |  |  | .29 |
2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  | $ | 190,814 |  |  |  | 222,480 |  |  |  | 221,290 |  |  |  | 216,228 |
Operating income |  |  | 25,038 |  |  |  | 55,264 |  |  |  | 51,228 |  |  |  | 38,802 |
Income before income taxes |  |  | 20,375 |  |  |  | 50,990 |  |  |  | 46,917 |  |  |  | 34,662 |
Net income |  |  | 12,474 |  |  |  | 31,413 |  |  |  | 27,844 |  |  |  | 21,421 |
Basic income per common share |  |  | .33 |  |  |  | .81 |  |  |  | .72 |  |  |  | .55 |
Diluted income per common share |  |  | .32 |  |  |  | .81 |  |  |  | .71 |  |  |  | .55 |
Income per common share is computed independently for each of the quarters presented. Therefore, the sum of the quarterly income per share does not necessarily equal the total computed for the year.

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- Definition The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e765-108305 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e725-108305 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=25249566&loc=d3e1280-108306 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a + Details
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