Investments - Scheduled of Principal Payments Due to be Received under Loans Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018
Loans Receivable Scheduled Principal Payments Due To Be Received [Abstract]
April 1, 2019 - December 31, 2019	$ 3,510
2020	14
2021	2,391
2022	17
2023	18
Thereafter	3,362
Total	$ 9,312	$ 14,854