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Segment Reporting Revenue from External Customers by Products and Services (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenue from External Customer [Line Items]      
Total Revenues $ 1,224,361 $ 1,790,793 $ 1,895,910
United States      
Revenue from External Customer [Line Items]      
Total Revenues 260,867 403,916 429,599
Americas (excluding the United States)      
Revenue from External Customer [Line Items]      
Total Revenues 187,779 348,670 367,561
Asia Pacific      
Revenue from External Customer [Line Items]      
Total Revenues 127,415 172,439 131,578
Europe, Middle East, Africa      
Revenue from External Customer [Line Items]      
Total Revenues $ 648,300 $ 865,768 $ 967,172