Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Level 3 Fair Value of Certain Assets Measured on a Non-recurring Basis (Details)

v3.20.4
Fair Value Measurements - Level 3 Fair Value of Certain Assets Measured on a Non-recurring Basis (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Goodwill [Roll Forward]      
43830 $ 182,377    
Decrease from divestiture (7,379)    
Carrying value prior to impairment   $ 174,998  
Impairment charge (30,945)    
Carrying value after impairment 144,053    
Carrying value of assets not subject to impairment charge 94,073    
Balance as of December 31, 2020 $ 238,126 $ 276,450 $ 198,622