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Note 3 - Acquisitions and Divestitures (Details Textual) - USD ($) $ in Millions |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 02, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2018 | Dec. 31, 2018
Proceeds from Divestiture of Businesses |  | $ 231.0 |  |  |
Gain (Loss) on Disposition of Business |  | (2.0) |  |  |
Finite-lived Intangible Assets Acquired |  | 493.0 |  |  |
Goodwill, Ending Balance |  | 1,434.0 | $ 612.0 |  | $ 612.0
Raycom [Member] |  |  |  |  |
Disposal Group, Including Discontinued Operation, Consideration |  | 233.0 |  |  |
Payments to Acquire Businesses, Gross | $ 2,840.0 |  |  |  |
Business Combination, Consideration Transferred, Total | 3,660.0 | 3,677.0 |  |  |
Goodwill, Ending Balance | 822.0 |  |  |  |
Business Acquisition, Goodwill, Expected Tax Deductible Amount | 150.0 |  |  |  |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual |  | 280.0 |  |  |
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |  | 6.0 |  |  |
Business Combination, Acquisition Related Costs |  | 68.0 |  |  |
Raycom [Member] | Legal, Consulting and Other Professional Fees [Member] |  |  |  |  |
Business Combination, Acquisition Related Costs |  | 22.0 |  |  |
Raycom [Member] | Incentive Compensation and Severance Costs [Member] |  |  |  |  |
Business Combination, Acquisition Related Costs |  | 18.0 |  |  |
Raycom [Member] | Termination of Sales Representation Agreements [Member] |  |  |  |  |
Business Combination, Acquisition Related Costs |  | 28.0 |  |  |
Raycom [Member] | Retransmission Agreements [Member] |  |  |  |  |
Finite-lived Intangible Assets Acquired | $ 305.0 |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 4 years 328 days |  |  |  |
Raycom [Member] | Off-Market Favorable Lease [Member] |  |  |  |  |
Finite-lived Intangible Assets Acquired | $ 76.0 |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 9 years 182 days |  |  |  |
Raycom [Member] | Network Affiliation Agreements [Member] |  |  |  |  |
Finite-lived Intangible Assets Acquired | $ 57.0 |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 4 years 182 days |  |  |  |
Raycom [Member] | Minimum [Member] |  |  |  |  |
Property, Plant and Equipment, Useful Life | 3 years |  |  |  |
Raycom [Member] | Maximum [Member] |  |  |  |  |
Property, Plant and Equipment, Useful Life | 40 years |  |  |  |
Raycom [Member] | Common Stock [Member] |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | 11,500,000 |  |  |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable | $ 170.0 |  |  |  |
Raycom [Member] | Preferred Stock [Member] | Series A Perpetual Preferred Stock [Member] |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | 650,000 |  |  |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable | $ 650.0 |  |  |  |
KYOU-TV and WUPV-TV [Member] |  |  |  |  |
Disposal Group, Including Discontinued Operation, Consideration |  |  |  |  |
Payments to Acquire Businesses, Gross | 17.0 |  |  |  |
Business Combination, Consideration Transferred, Total |  | $ 17.0 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Gross Contractual Receivables above Their Fair Value | 2.0 |  |  |  |
WSWG-TV [Member] |  |  |  |  |
Proceeds from Divestiture of Businesses |  |  |  |  | $ 8.5
Gain (Loss) on Disposition of Business |  |  | $ 4.8 |  |
Stations Acquired from Raycom [Member] |  |  |  |  |
Gain (Loss) on Disposition of Business | (233.0) |  |  |  |
Disposal Group, Including Discontinued Operation, Consideration | $ 8.0 |  |  |  |

X
- Definition Represents the gross contractual receivables above their fair value recorded at acquisition date. + References No definition available. + Details
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