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Related Party Transactions
 12 Months Ended
Dec. 31, 2021
Related Party Transactions [Abstract]  
Related Party Transactions Related Party Transactions
In 2021, 2020 and 2019, we incurred software and software maintenance fees of $0.9 million, $1.0 million and $0.9 million, respectively, from two software vendors controlled by our largest stockholder. Amounts due to these vendors were immaterial as of December 31, 2021 and 2020.
In 2020 and 2019, we paid lead generation payments of $0.8 million and $2.3 million, respectively, to a vendor in which a relative of the chairman of our board of directors is their President. At December 31, 2020 and 2019, amounts due to this vendor were $1.5 million and $0.8 million, respectively. In 2020 and 2019, we received lead generation payments of $0.6 million and $3.6 million, respectively, from this same vendor. There were no such transactions during the year ended December 31, 2021.