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Fair Value Measurements (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Liabilities:          
Goodwill impairment   $ 13,382   $ 13,382  
Impairment and other losses $ 0 $ 18,840 $ 875 19,001  
Impairment of Right-Of-Use Asset And Accelerated Operating Expenses       $ 5,619  
Measurement Input, Discount Rate          
Liabilities:          
Business Combination, Contingent Consideration, Liability, Measurement Input 0.051   0.051    
Senior Notes | Reported Value Measurement          
Liabilities:          
Debt Instrument, Fair Value Disclosure $ 870,256   $ 870,256   $ 870,256
Senior Notes | Estimate of Fair Value Measurement          
Liabilities:          
Debt Instrument, Fair Value Disclosure 882,222   882,222   883,580
6.50% Notes due 2024 | Fair Value, Inputs, Level 1 | Senior Notes          
Liabilities:          
Long term debt, Carrying Amount $ 870,256   $ 870,256   $ 870,256