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Fair Value - Financial Instruments Not Carried at Fair Value (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Carrying value    
Carrying value and fair value measurements of financial instruments not carried at fair value    
Agent loans $ 69,342 $ 66,368
Long-term borrowings 93,546 94,070
Level 3 | Fair value    
Carrying value and fair value measurements of financial instruments not carried at fair value    
Agent loans 64,826 68,957
Long-term borrowings $ 93,294 $ 103,981