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Discontinued operations - Narrative (Details) $ in Thousands |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jul. 31, 2017 USD ($) seat | Sep. 30, 2018 USD ($) | Jun. 30, 2017 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | May 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Conversion ratio for every share of Tegna common stock owned by stockholders |  |  |  |  |  |  | 0.3333
Goodwill impairment charges |  |  | $ 332,900 |  |  |  |
Cash paid for interest |  |  |  | $ 186,086 | $ 182,465 | $ 200,512 |
Career Builder |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Pre-tax loss related to sale of business |  |  |  |  |  | 342,900 |
Goodwill impairment charges |  |  |  |  |  | 332,900 |
Business exit costs |  |  |  |  |  | 10,900 |
Career Builder |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Equity method investment retained after disposal (as a percent) | 17.00% |  |  |  |  |  |
Equity method investment retained after disposal, ownership Interest after disposal, diluted (as a percent) | 10.00% |  |  |  |  |  |
Discontinued Operations, Disposed of by Sale |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Tax benefit from discontinued operations |  | $ 4,300 |  |  |  |  |
Discontinued Operations, Disposed of by Sale | Career Builder |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Total sale price | $ 198,300 |  |  |  |  |  |
Discontinued Operations, Disposed of by Sale | Career Builder |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Equity method investment retained after disposal (as a percent) | 17.00% |  |  |  |  |  |
Equity method investment retained after disposal, ownership Interest after disposal, diluted (as a percent) | 10.00% |  |  |  |  |  |
Number seats retained on Board of Directors | seat | 2 |  |  |  |  |  |
Number of members on Board of Directors | seat | 10 |  |  |  |  |  |
Income (Loss) from ongoing equity method investment in discontinued operation after disposal |  |  |  | $ 500 | $ 14,200 |  |
Parent Company | Career Builder |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Pre-tax loss related to sale of business |  |  |  |  |  | $ 271,700 |

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