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Acquisitions and Dispositions - Pro Forma Results of Operations for Acquisitions (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Acquisitions and Dispositions |  |
Net operating revenue | $ 123,072 | $ 129,228
Station operating expense | 92,692 | 97,314
Corporate general and administrative | 11,460 | 11,359
Other operating expense , net | 112 | 61
Operating income | 18,808 | 20,494
Interest expense | 735 | 946
Interest income | (610) | (631)
Other income | (16) | (23)
Income before income tax expense | 18,699 | 20,202
Income tax expense (benefit) expense | 5,420 | 5,944
Net income | $ 13,279 | $ 14,258
Earnings per share: |  |
Basic | $ 2.23 | $ 2.40
Diluted | $ 2.23 | $ 2.40

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- Definition The pro forma income from continuing operations before taxes, changes in accounting and extraordinary items, for the period as if the business combination or combinations had been completed at the beginning of a period. + References No definition available. + Details
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