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Subordinated Debentures and Convertible Notes - Schedule of Convertible Debt (Details) - Convertible Notes - USD ($)
$ in Thousands
 6 Months Ended 9 Months Ended
Jun. 07, 2018
Jun. 30, 2022
Sep. 30, 2022
Dec. 31, 2021
Debt Instrument [Line Items]        
Capitalization Period 5 years 5 years 5 years  
Gross Carrying Amount        
Convertible notes principal balance     $ 217,500 $ 217,500
Issuance costs to be capitalized     (4,119) (4,119)
Carrying balance of convertible notes     213,381 213,381
Total Capitalization        
Issuance costs to be capitalized     3,532 2,828
Carrying balance of convertible notes     3,532 2,828
Carrying Amount        
Convertible notes principal balance     217,500 217,500
Issuance costs to be capitalized     (587) (1,291)
Carrying balance of convertible notes     $ 216,913 $ 216,209