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Restatement of Consolidated Financial Statements - Consolidated Statement of Stockholders' Equity (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Dec. 31, 2018
Dec. 31, 2017
Error corrections and prior period adjustments restatement                  
Total stockholders’ equity $ 912,706 $ 965,828 $ 972,730 $ 971,597 $ 975,373 $ 963,082 $ 973,226 $ 1,012,112 $ 571,584
As originally reported                  
Error corrections and prior period adjustments restatement                  
Total stockholders’ equity 905,113 958,246 965,190 965,698 970,918 961,283      
Adjustments                  
Error corrections and prior period adjustments restatement                  
Total stockholders’ equity 7,593 7,582 7,540 5,899 4,455 1,799      
Accumulated deficit                  
Error corrections and prior period adjustments restatement                  
Total stockholders’ equity (357,751) $ (314,205) $ (301,468) $ (292,328) (285,789) $ (278,913) $ (263,381) $ (204,294) $ (636,227)
Accumulated deficit | As originally reported                  
Error corrections and prior period adjustments restatement                  
Total stockholders’ equity (365,344)       (290,244)        
Accumulated deficit | Adjustments                  
Error corrections and prior period adjustments restatement                  
Total stockholders’ equity $ 7,593       $ 4,455