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Summary of Significant Accounting Policies - New Accounting Pronouncements (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Mar. 31, 2020
Jan. 01, 2020
Dec. 31, 2019
Adoption of new accounting pronouncements        
Accounts receivable, net of allowance $ 54,347 $ 54,347   $ 62,405
Accumulated other comprehensive loss $ (17,139)     $ (13,295)
ASU 2016-01 | Adjustment        
Adoption of new accounting pronouncements        
Accounts receivable, net of allowance     $ (300)  
Accumulated other comprehensive loss     $ (300)