Acquisitions and Dispositions - Components of Total Consideration Paid, Payable or Issued Upon Closing of Merger (Parenthetical) (Details) - Media General [Member]	Jan. 17, 2017 shares
Business Acquisition [Line Items]
Common stock, shares issued in business acquisition	15,670,094
Stock issued during period, shares, treasury stock Reissued	560,316
Stock option replacement awards, number of stock options	228,438