Other Assets - Amortized Cost (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost of nonaccrual notes receivable	$ 0	$ 9
Loan Receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost of nonaccrual notes receivable	0	0
Hardware Financing Receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized cost of nonaccrual notes receivable	$ 0	$ 9