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Note 17 - Quarterly Results of Operations (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2018
Notes Tables |
Quarterly Financial Information [Table Text Block] |
|  | (in thousands except per share amounts) |
|  | Mar. 31, |  |  | June 30, |  |  | Sep. 30, |  |  | Dec. 31, |
Quarters ended |  | 2018 |  |  | 2018 |  |  | 2018 |  |  | 2018 |
Total revenue |  | $ | 173,566 |  |  | $ | 196,318 |  |  | $ | 243,303 |  |  | $ | 272,268 |
Operating income |  |  | 6,425 |  |  |  | 14,065 |  |  |  | 16,181 |  |  |  | 22,315 |
Net income |  |  | 4,417 |  |  |  | 9,971 |  |  |  | 11,614 |  |  |  | 16,501 |
Basic income per share |  |  | 0.24 |  |  |  | 0.54 |  |  |  | 0.63 |  |  |  | 0.91 |
Diluted income per share |  |  | 0.24 |  |  |  | 0.54 |  |  |  | 0.63 |  |  |  | 0.89 |
|  | (in thousands except per share amounts) |
|  | Mar. 31, |  |  | June 30, |  |  | Sep. 30, |  |  | Dec. 31, |
Quarters ended |  | 2017) |  |  | 2017 |  |  | 2017 |  |  | 2017 (1 | )
Total revenue |  | $ | 158,744 |  |  | $ | 164,326 |  |  | $ | 178,631 |  |  | $ | 203,306 |
Operating income |  |  | 309 |  |  |  | 3,962 |  |  |  | 9,041 |  |  |  | 14,843 |
Net income |  |  | (39 | ) |  |  | 1,548 |  |  |  | 4,632 |  |  |  | 49,298 |
Basic income per share |  |  | (0.00 | ) |  |  | 0.08 |  |  |  | 0.25 |  |  |  | 2.70 |
Diluted income per share |  |  | (0.00 | ) |  |  | 0.08 |  |  |  | 0.25 |  |  |  | 2.69 |

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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=109225645&loc=d3e1280-108306 + Details
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