Leases - Sales-Type Leases (Details) - USD ($) $ in Thousands		Dec. 31, 2021	Dec. 31, 2020
Net Investment in Lease [Abstract]
Lease payment receivables, net		$ 44,378	$ 49,806
Estimated residual value of leased assets (unguaranteed)		890	890
Net investment in sales-type leases		45,268	50,696
Less: current portion	[1]	(5,784)	(5,428)
Non-current portion of net investment in sales-type leases	[1]	39,484	45,268
Current estimated credit losses		100	$ 100
Sales-type and Direct Financing Leases, Lease Receivable, Fiscal Year Maturity [Abstract]
2022		6,110
2023		6,435
2024		6,797
2025		7,125
2026		7,491
Thereafter		11,690
Total undiscounted cash flows		45,648
Less: imputed interest		(1,219)
Present value of lease payments		$ 44,429

[1] We have variable interest entities, which represent a portion of the consolidated balances recorded within these financial statement line items in the consolidated balance sheets (see Note 11 - Portfolio Financings).