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Fair Value Measurements - Safeguarding Assets and Liabilities (Details)
$ in Thousands
Jun. 30, 2022
USD ($)
digitalAsset
Jan. 01, 2022
USD ($)
Platform Operator, Crypto-Asset [Line Items]    
Digital assets safeguarding liability and corresponding safeguarding asset $ 112,010 $ 266,014
Bitcoin (BTC)    
Platform Operator, Crypto-Asset [Line Items]    
Digital assets safeguarding liability and corresponding safeguarding asset 48,143  
Ethereum (ETH)    
Platform Operator, Crypto-Asset [Line Items]    
Digital assets safeguarding liability and corresponding safeguarding asset 34,135  
Cardano (ADA)    
Platform Operator, Crypto-Asset [Line Items]    
Digital assets safeguarding liability and corresponding safeguarding asset 8,383  
Dogecoin (DOGE)    
Platform Operator, Crypto-Asset [Line Items]    
Digital assets safeguarding liability and corresponding safeguarding asset 4,182  
Solana (SOL)    
Platform Operator, Crypto-Asset [Line Items]    
Digital assets safeguarding liability and corresponding safeguarding asset 3,778  
Ethereum Classic (ETC)    
Platform Operator, Crypto-Asset [Line Items]    
Digital assets safeguarding liability and corresponding safeguarding asset 2,289  
All other    
Platform Operator, Crypto-Asset [Line Items]    
Digital assets safeguarding liability and corresponding safeguarding asset $ 11,100  
Number of digital assets held | digitalAsset 25