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Litigation - Narratives (Details)
Oct. 05, 2021
plaintiff
Apr. 02, 2021
plaintiff
Apr. 20, 2021
borrowerDefenseApplication
Loss Contingencies [Line Items]      
Number of borrower defense applications submitted (more than) | borrowerDefenseApplication     1,000
Number of borrower defense applications submitted received for repayment (approximately) | borrowerDefenseApplication     500
Number of plaintiffs | plaintiff   6  
Subsequent Event      
Loss Contingencies [Line Items]      
Number of plaintiffs | plaintiff 6