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Summary of Significant Accounting Policies - Credit Losses (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2023
Dec. 31, 2021
Dec. 31, 2020
Accounting Policies [Abstract]              
OTTI on AFS debt securities (Note 5)     $ 4,943 $ 0 $ 12,621 $ 13,726 $ 0
Bad debt expense on related party receivable (Note 9)     4,440 0 6,723 5,029 0
Bad debt expense on other receivables     0 0 1,236 0 0
Provision for credit losses $ 0 $ 18,790 $ 9,383 $ 0 $ 20,580 $ 18,755 $ 0