Borrowings - Short-term Borrowings, net (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Short-term Debt [Line Items]
Borrowing Outstanding	$ 63,046	$ 65,073
Deferred Debt Issuance Cost	(1,546)	(387)
Short-term Borrowings, net	61,500	64,686
Short-term bank loans
Short-term Debt [Line Items]
Borrowing Outstanding	5,046	28,673
Deferred Debt Issuance Cost	0	0
Short-term Borrowings, net	5,046	28,673
Broker-dealer credit facilities
Short-term Debt [Line Items]
Borrowing Outstanding	58,000	36,400
Deferred Debt Issuance Cost	(1,546)	(387)
Short-term Borrowings, net	$ 56,454	$ 36,013