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Acquisitions and Dispositions (Details 1) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | [1] | Dec. 31, 2016 | [1] | Sep. 30, 2016 | [1] | Jun. 30, 2016 | [1] | Mar. 31, 2016 | [1] | Dec. 31, 2017 | Dec. 31, 2016
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Net operating revenue |  |  |  |  |  |  |  |  | $ 123,651 | $ 126,789
Station operating expense |  |  |  |  |  |  |  |  | 92,563 | 93,818
Corporate general and administrative |  |  |  |  |  |  |  |  | 11,657 | 10,980
Other operating (income) expenses, net |  |  |  |  |  |  |  |  | 55 | (1,351)
Impairment of intangible assets |  |  |  |  |  |  |  |  | 1,449 | 0
Operating income |  |  |  |  |  |  |  |  | 17,927 | 23,342
Interest expense |  |  |  |  |  |  |  |  | 903 | 744
Income from continuing operations before income tax expense | $ 3,659 | $ 5,255 | $ 5,647 | $ 1,765 | $ 5,557 | $ 6,581 | $ 6,214 | $ 3,431 | 17,024 | 22,598
Income tax (benefit) expense |  |  |  |  |  |  |  |  | (5,634) | 9,207
Income from continuing operations, net of tax |  |  |  |  |  |  |  |  | 22,658 | 13,391
Income from discontinued operations, net of tax |  |  |  |  |  |  |  |  | 32,471 | 5,276
Net income |  |  |  |  |  |  |  |  | $ 55,129 | $ 18,667
Basic earnings per share: |  |  |  |  |  |  |  |  |  |
From continuing operations |  |  |  |  |  |  |  |  | $ 3.84 | $ 2.28
From discontinued operations |  |  |  |  |  |  |  |  | 5.50 | 0.90
Basic earnings per share |  |  |  |  |  |  |  |  | 9.34 | 3.18
Diluted earnings per share: |  |  |  |  |  |  |  |  |  |
From continuing operations |  |  |  |  |  |  |  |  | 3.84 | 2.28
From discontinued operations |  |  |  |  |  |  |  |  | 5.50 | 0.90
Diluted earnings per share |  |  |  |  |  |  |  |  | $ 9.34 | $ 3.18
[1] | Certain prior year amounts and March 31, 2017 quarterly data have been reclassified to conform with current presentation.

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