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Note 3 - Acquisitions and Dispositions (Details Textual) - USD ($) $ in Thousands |  |  |  |  |  |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 01, 2017 | Jun. 01, 2017 | May 01, 2017 | Jan. 17, 2017 | Jan. 13, 2017 | Jun. 27, 2016 | Jun. 01, 2016 | Feb. 16, 2016 | Feb. 01, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 30, 2016
Proceeds from Divestiture of Businesses |  |  |  |  |  |  |  |  |  | $ 8,500 |  | $ 11,200 |
Business Combination, Consideration Transferred, Total |  |  |  |  |  |  |  |  |  |  |  | 473,074 |
Goodwill, Ending Balance |  |  |  |  |  |  |  |  |  | 612,425 | 611,100 | 485,318 | $ 485,318
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual |  |  |  |  |  |  |  |  |  |  | 79,800 | 130,400 |
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax |  |  |  |  |  |  |  |  |  |  | 33,700 | 55,800 |
Business Combination, Acquisition Related Costs |  |  |  |  |  |  |  |  |  |  | 1,100 | 7,400 |
Long-term Debt, Total |  |  |  |  |  |  |  |  |  | 2,500,000 | 1,800,000 |  |
Finite-lived Intangible Assets Acquired |  |  |  |  |  |  |  |  |  | 0 | 42,606 |  |
Goodwill, Acquired During Period |  |  |  |  |  |  |  |  |  | $ 3,077 | 125,782 | 72,300 |
2016 Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt, Total |  |  |  |  |  |  |  | $ 425,000 |  |  |  |  |
Fairbanks Acquistion [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  |  | $ 8,000 |  |  |  |  |  |  |  |
Goodwill, Ending Balance |  |  |  |  |  |  |  |  |  |  | 471 |  |
Green Bay Acquisition and Davenport Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Total |  |  |  | $ 269,900 |  |  |  |  |  |  |  |  |
Clarksburg Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  |  |  |  | $ 16,500 |  |  |  |  |  |
Business Combination, Consideration Transferred, Total |  |  | $ 26,500 |  |  |  |  |  |  |  |  |  |
Goodwill, Ending Balance |  |  |  |  |  |  |  |  |  |  | 3,222 |  |
Bangor Acquisition and Gainesville Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Total |  |  | $ 85,000 |  |  |  |  |  |  |  |  |  |
Burlington and Plattsburg Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross | $ 5,800 | $ 23,200 |  |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Total | $ 29,000 |  |  |  |  |  |  |  |  |  |  |  |
2017 Acquisitions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, Ending Balance |  |  |  |  |  |  |  |  |  |  | 128,859 |  |
2017 Acquisitions [Member] | Retransmission Agreements [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Gross, Total |  |  |  |  |  |  |  |  |  |  | $ 27,900 |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life |  |  |  |  |  |  |  |  |  |  | 5 years 36 days |  |
2017 Acquisitions [Member] | Advertising Relationships [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Gross, Total |  |  |  |  |  |  |  |  |  |  | $ 5,300 |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life |  |  |  |  |  |  |  |  |  |  | 10 years 255 days |  |
2017 Acquisitions [Member] | Income Leases [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Gross, Total |  |  |  |  |  |  |  |  |  |  | $ 3,000 |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life |  |  |  |  |  |  |  |  |  |  | 11 years 328 days |  |
2017 Acquisitions [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  |  |  |  |  |  |  |  | 3 years |  |  |
2017 Acquisitions [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  |  |  |  |  |  |  |  | 40 years |  |  |
Schurz Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Total |  |  |  |  |  |  |  | 443,100 |  |  |  |  |
KYES-TV Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  |  |  | $ 500 |  |  |  |  |  |  |
Goodwill, Ending Balance |  |  |  |  |  |  |  |  |  |  |  | 28 |
WBXX Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Divestiture of Businesses |  |  |  |  |  |  |  |  |  |  |  | 0 |
Business Combination, Consideration Transferred, Total |  |  |  |  |  |  |  |  |  |  |  | 30,000 |
Goodwill, Ending Balance |  |  |  |  |  |  |  |  |  |  |  | 10,288 |
Accounts Receivable Contractual Amounts in Excess of Fair Value |  |  |  |  |  |  |  |  |  |  |  | $ 200 |
Schurz Acquisition and Related Transaction [Member] | Retransmission Agreements [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life |  |  |  |  |  |  |  |  |  |  |  | 4 years 328 days |
Finite-lived Intangible Assets Acquired |  |  |  |  |  |  |  |  |  |  |  | $ 14,900 |
Schurz Acquisition and Related Transaction [Member] | Advertising Relationships [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life |  |  |  |  |  |  |  |  |  |  |  | 5 years 182 days |
Finite-lived Intangible Assets Acquired |  |  |  |  |  |  |  |  |  |  |  | $ 1,600 |
Schurz Acquisition and Related Transaction [Member] | Off-Market Favorable Lease [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life |  |  |  |  |  |  |  |  |  |  |  | 9 years 182 days |
Finite-lived Intangible Assets Acquired |  |  |  |  |  |  |  |  |  |  |  | $ 2,600 |
Schurz Acquisition and Related Transaction [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  |  |  |  |  |  |  |  | 3 years |  |  |
Schurz Acquisition and Related Transaction [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  |  |  |  |  |  |  |  | 40 years |  |  |
WSWG-TV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Divestiture of Businesses |  |  |  |  |  |  |  |  |  | $ 8,500 |  |  |
Gain (Loss) on Disposition of Business |  |  |  |  |  |  |  |  |  | $ 4,800 |  |  |
KAKE-TV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Divestiture of Businesses |  |  |  |  |  |  |  |  | $ 11,200 |  |  | 11,200 |
Gain (Loss) on Disposition of Business |  |  |  |  |  |  |  |  | $ 2,000 |  |  |  |
Business Combination, Consideration Transferred, Total |  |  |  |  |  |  |  |  |  |  |  | $ 0 |
Schurz Radio Stations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Divestiture of Businesses |  |  |  |  |  |  |  | $ 16,000 |  |  |  |  |

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