Customer Lists, Net - Other Identifiable Intangible Assets (Details) - Customer lists, net - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Total finite-lived intangible assets	$ 10,966	$ 12,804
Customer lists at cost	25,288	25,288
Less: Accumulated amortization	14,322	12,484
Total finite-lived intangible assets	$ 10,966	$ 12,804