Summary of Significant Accounting Policies - Contracts in Transit, Accounts Receivable and Current Expected Credit Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
"Shipping, Handling and Transportation Costs [Abstract]"
Number of days for retail installment sales contracts funded after the initial approval of the retail installment sales contract by third party lender	10 days
Accounts receivable due in excess of one year	$ 7,800	$ 8,200
Allowance for doubtful accounts - contracts in transit	0	0
Allowance for doubtful accounts
Balance, beginning of period	3,393	3,537
Charged to bad debt expense	1,568	1,068
Deductions	(250)	(1,212)
Balance, end of period	$ 4,711	$ 3,393