Investments in Other Entities — Equity Method - Gain on Sale (Details) - USD ($)		3 Months Ended		6 Months Ended
	Apr. 30, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Cash proceeds (excludes proceeds to settle indebtedness owed to APC from UCI)				$ 52,743,000	$ 0
Preferred shares in Bright Health, Inc.		$ 37,075,000		37,075,000		$ 896,000
Less: Carrying value of equity method investment on date of sale		(26,817,000)		(26,817,000)		(28,427,000)
Gain on sale of equity method investment		99,647,000	$ 0	99,647,000	$ 0
Universal Care, Inc.
Schedule of Equity Method Investments [Line Items]
Cash proceeds (excludes proceeds to settle indebtedness owed to APC from UCI)	$ 52,743,000
Beneficial interest in UCI	15,723,000
Less: Carrying value of equity method investment on date of sale	(4,998,000)	$ 0		$ 0		$ (1,438,000)
Gain on sale of equity method investment	99,647,000
Universal Care, Inc. | Bright | Preferred Stock
Schedule of Equity Method Investments [Line Items]
Preferred shares in Bright Health, Inc.	$ 36,179,000