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Note 16 - Unaudited Quarterly Financial Data (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Quarterly Financial Information [Table Text Block] |
|  | First |  |  | Second |  |  | Third |  |  | Fourth |
|  | Quarter |  |  | Quarter |  |  | Quarter |  |  | Quarter |
201 9 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 1,348,317 |  |  | $ | 1,544,561 |  |  | $ | 1,599,265 |  |  | $ | 1,317,704 |
Gross profit |  |  | 256,916 |  |  |  | 269,506 |  |  |  | 264,768 |  |  |  | 234,438 |
Operating income |  |  | 56,867 |  |  |  | 61,792 |  |  |  | 58,323 |  |  |  | 39,423 |
Income before income taxes |  |  | 49,558 |  |  |  | 54,410 |  |  |  | 52,210 |  |  |  | 33,345 |
Net income |  | $ | 37,104 |  |  | $ | 41,621 |  |  | $ | 39,104 |  |  | $ | 23,754 |
Earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 1.01 |  |  | $ | 1.13 |  |  | $ | 1.07 |  |  | $ | 0.65 |
Diluted |  | $ | 0.98 |  |  | $ | 1.10 |  |  | $ | 1.05 |  |  | $ | 0.64 |
201 8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 1,240,781 |  |  | $ | 1,348,831 |  |  | $ | 1,376,136 |  |  | $ | 1,540,442 |
Gross profit |  |  | 226,995 |  |  |  | 243,377 |  |  |  | 249,057 |  |  |  | 258,840 |
Operating income |  |  | 32,389 |  |  |  | 43,426 |  |  |  | 58,649 |  |  |  | 68,387 |
Income before income taxes |  |  | 28,083 |  |  |  | 38,932 |  |  |  | 54,181 |  |  |  | 61,973 |
Net income |  | $ | 21,039 |  |  | $ | 29,389 |  |  | $ | 41,665 |  |  | $ | 46,969 |
Earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.53 |  |  | $ | 0.75 |  |  | $ | 1.06 |  |  | $ | 1.22 |
Diluted |  | $ | 0.51 |  |  | $ | 0.72 |  |  | $ | 1.03 |  |  | $ | 1.20 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118952077&loc=d3e1280-108306 + Details
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