Investments - Schedule of Other Investments (Details) $ in Thousands	Sep. 30, 2020 USD ($)
Other Investments
Other investments, cost	$ 37,611
Unrealized Loss	(328)
Unrealized Gain	1,088
Total other investments	38,371
Certificates of Deposit
Other Investments
Other investments, cost	300
Unrealized Loss	0
Unrealized Gain	0
Fair value - certificates of deposit	300
Limited Partnership
Other Investments
Other investments, cost	9,510
Unrealized Loss	(327)
Unrealized Gain	1,088
Fair value - partnerships	10,271
Short-term Investments
Other Investments
Other investments, cost	27,801
Unrealized Loss	(1)
Unrealized Gain	0
Fair Value - short term investments	$ 27,800