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Indebtedness New Media Credit Agreement (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Apr. 01, 2019
Nov. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Dec. 30, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 27, 2015
USD ($)
Debt Instrument [Line Items]            
Loss on extinguishment of debt     $ 6,058 $ 2,886 $ 4,767  
Interest rate 2.00%          
Halifax Media            
Debt Instrument [Line Items]            
Aggregate principal amount of debt           $ 8,000
New Media Credit Agreement | Revolving Credit Facility            
Debt Instrument [Line Items]            
Maximum borrowing capacity     $ 40,000      
Total leverage ratio, not to exceed     3.25      
Loss on extinguishment of debt   $ 3,700