Related Party Transactions - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Related Party Transaction [Line Items]
Balance with Fund Manager	$ 17,809		$ 14,613
Investment income (loss) generated from mutual funds	$ (325)	$ 77
Maximum [Member]
Related Party Transaction [Line Items]
Fund management fee percent	0.35%
Other Income [Member]
Related Party Transaction [Line Items]
Investment income (loss) generated from mutual funds	$ (293)	$ 146
Cash and Cash Equivalents [Member]
Related Party Transaction [Line Items]
Balance with Fund Manager	12,513		8,992
Marketable Securities [Member]
Related Party Transaction [Line Items]
Balance with Fund Manager	$ 5,296		$ 5,621