Allowance for Credit Losses - Summary of Finance Receivables by Aging Category (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounts receivable	$ 19,488	$ 13,894
Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounts receivable	17,414	13,398
31-60 Days
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounts receivable	83	489
61-90 Days
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounts receivable	1,602	7
91 Days and over
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounts receivable	$ 389	$ 0