Investments - Remaining Unfunded Commitments on Other Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 63,313	$ 1,107
% of Total	100.00%	100.00%
Private equity investments
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 43,164	$ 0
% of Total	68.20%	0.00%
Investments in direct lending entities
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 19,823	$ 767
% of Total	31.30%	69.30%
Investment in limited partnerships
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 326	$ 340
% of Total	0.50%	30.70%