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Note 17 - Unaudited Quarterly Financial Data (Tables) | 12 Months Ended
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Dec. 31, 2016
Notes Tables |
Quarterly Financial Information [Table Text Block] |
|  | First |  |  | Second |  |  | Third |  |  | Fourth |
|  | Quarter |  |  | Quarter |  |  | Quarter |  |  | Quarter |
201 6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 1,070,840 |  |  | $ | 1,026,462 |  |  | $ | 1,096,041 |  |  | $ | 1,021,271 |
Gross profit |  |  | 183,270 |  |  |  | 180,478 |  |  |  | 181,316 |  |  |  | 172,948 |
Operating income |  |  | 8,181 |  |  |  | 21,572 |  |  |  | 27,588 |  |  |  | 23,387 |
Income before income taxes |  |  | 3,942 |  |  |  | 17,809 |  |  |  | 24,303 |  |  |  | 20,395 |
Net income |  | $ | 2,395 |  |  | $ | 10,817 |  |  | $ | 14,880 |  |  | $ | 12,490 |
Earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.06 |  |  | $ | 0.27 |  |  | $ | 0.38 |  |  | $ | 0.32 |
Diluted |  | $ | 0.06 |  |  | $ | 0.27 |  |  | $ | 0.37 |  |  | $ | 0.31 |
2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 1,193,535 |  |  | $ | 917,878 |  |  | $ | 1,294,076 |  |  | $ | 1,161,819 |
Gross profit |  |  | 193,622 |  |  |  | 207,633 |  |  |  | 208,008 |  |  |  | 175,684 |
Operating income |  |  | 30,329 |  |  |  | 35,560 |  |  |  | 36,030 |  |  |  | 19,357 |
Income before income taxes |  |  | 27,388 |  |  |  | 31,962 |  |  |  | 32,462 |  |  |  | 15,991 |
Net income |  | $ | 16,781 |  |  | $ | 19,576 |  |  | $ | 19,883 |  |  | $ | 9,813 |
Earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.42 |  |  | $ | 0.49 |  |  | $ | 0.49 |  |  | $ | 0.24 |
Diluted |  | $ | 0.41 |  |  | $ | 0.48 |  |  | $ | 0.48 |  |  | $ | 0.24 |

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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/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=68076893&loc=d3e1280-108306 + Details
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