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Disclosure About Fair Value of Financial Instruments - Carrying Amount and Estimated Fair Values of Company's Financial Instruments (Detail) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Mar. 31, 2022
Dec. 31, 2021
Assets        
Net finance receivables $ 1,443,304 $ 1,469,585    
Restricted available-for-sale investments 22,489 20,416    
Interest rate caps     $ 16,744 $ 6,586
Level 1 [Member] | Carrying Amount [Member]        
Assets        
Cash 7,108 3,873    
Restricted cash 127,178 127,926    
Level 1 [Member] | Estimated Fair Value [Member]        
Assets        
Cash 7,108 3,873    
Restricted cash 127,178 127,926    
Level 3 [Member] | Carrying Amount [Member]        
Assets        
Net finance receivables 1,443,304 1,469,585    
Liabilities:        
Debt 1,329,677 1,355,359    
Level 3 [Member] | Estimated Fair Value [Member]        
Assets        
Net finance receivables 1,532,558 1,554,794    
Liabilities:        
Debt 1,214,506 1,219,832    
Level 2 [Member] | Carrying Amount [Member] | Fair Value, Recurring        
Assets        
Restricted available-for-sale investments 22,489 20,416    
Level 2 [Member] | Estimated Fair Value [Member] | Fair Value, Recurring        
Assets        
Restricted available-for-sale investments $ 22,489 $ 20,416