Commitments and Contingencies - Insurance (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Insurance
Period for which insurance policies have been renewed	1 year
Specialty pharmaceutical dispensing operations
Insurance
Period for which insurance policies have been renewed	1 year
Per claim self-insured retention	$ 50
Aggregated self-insured retention	250
General liability
Insurance
Per claim un-aggregated self-insured retention	250
Managed care liability
Insurance
Per claim un-aggregated self-insured retention	1,000
Per class action claim un-aggregated self-insured retention	(10,000)
Per claim self-insured retention, anti-trust claim	5,000
Professional liability
Insurance
Per claim un-aggregated self-insured retention	$ 250