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Discontinued Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | [1] | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income from discontinued operations, net of tax |  | $ 0 | $ 0 | $ 0 | $ 0 | $ (30) | $ 30,451 | $ 1,159 | $ 891 | $ 0 | $ 32,471 |  | $ 5,276
Joplin, Missouri and Victoria, Texas Television Stations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Net operating revenue |  |  |  |  |  |  |  |  |  | 0 | 14,238 | [2] | 23,636
Station operating expense | [3] |  |  |  |  |  |  |  |  | 0 | 9,757 | [2] | 14,743
Other operating (income) expense |  |  |  |  |  |  |  |  |  | 0 | 31 | [2] | (42)
Operating income |  |  |  |  |  |  |  |  |  | 0 | 4,450 | [2] | 8,935
Interest expense | [4] |  |  |  |  |  |  |  |  | 0 | 21 | [2] | 32
Income before income taxes |  |  |  |  |  |  |  |  |  | 0 | 4,429 | [2] | 8,903
Pretax gain on the disposal of discontinued operations |  |  |  |  |  |  |  |  |  | 0 | 50,842 | [2] | 0
Total pretax gain on discontinued operations |  |  |  |  |  |  |  |  |  | 0 | 55,271 | [2] | 8,903
Income tax expense | [5] |  |  |  |  |  |  |  |  | 0 | 22,800 | [2] | 3,627
Income from discontinued operations, net of tax |  |  |  |  |  |  |  |  |  | $ 0 | $ 32,471 | [2] | $ 5,276
[1] | March 31, 2017 quarterly data have been reclassified to conform with current presentation.
[2] | Results of operations for the Television stations are reflected through August 31, 2017. The effective date of the sale was September 1, 2017.
[3] | No depreciation expense was recorded by the Company beginning May 9, 2017, the date the Television segment assets’ were held for sale.
[4] | Interest expense related to the Surtsey debt that is guaranteed by the Television stations. Our affiliate repaid this loan when the television stations were sold on September 1, 2017.
[5] | The effective tax rates on pretax income from discontinued operations were approximately 41%.

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