Notes Payable and Subordinated Borrowings - Schedule of Future Payments (Details) - Senior Notes [Member] $ in Thousands	Dec. 31, 2018 USD ($)
Debt Instrument [Line Items]
2019	$ 8,937
2020	8,937
2021	46,010
2022	7,083
2023	72,331
Thereafter	75,844
Total	$ 219,142