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Goodwill and Intangible Assets - Textual (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2019
USD ($)
reportable_segment
Dec. 31, 2018
USD ($)
reportable_segment
Dec. 31, 2017
USD ($)
reportable_segment
Goodwill [Line Items]              
Goodwill and other asset impairment $ 161 $ 6,655 $ 0 $ 63,879 $ 8,599 $ 87,204 $ 5,471
Number of Reporting Units | reportable_segment           3 2
Goodwill, Impairment Loss         4,879 $ 81,707  
Goodwill, impaired, accumulated impairment loss   $ 177,304   $ 173,205 $ 177,304 173,205  
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life         8 years    
Amortization Of Intangible Assets, Finite Lived         $ 11,828 $ 17,290 $ 17,125
Customer Relationships              
Goodwill [Line Items]              
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life         7 years    
Other Intangible Assets              
Goodwill [Line Items]              
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life         9 years    
Integrated Networks - Group A              
Goodwill [Line Items]              
Number of Reporting Units | reportable_segment         1    
Integrated Networks - Group B              
Goodwill [Line Items]              
Number of Reporting Units | reportable_segment           1 1
Impairment of Intangible Assets (Excluding Goodwill)           $ 3,180  
Media & Data Network              
Goodwill [Line Items]              
Number of Reporting Units | reportable_segment           1 1