Business Combinations - Additional Information (Details) - Reeves-Sain Drug Store, Inc [Member] - USD ($) $ in Millions		12 Months Ended
	Apr. 10, 2015	Feb. 02, 2019
Business Acquisition [Line Items]
Percentage of interest acquired	100.00%
Description of acquired entity		Provider of retail and specialty pharmaceutical services.
Total purchase consideration gross	$ 66.0
Working capital adjustments	10.3
Total purchase consideration	55.8
Business acquisition cost	0.5
Adjusted consideration in cash	42.8
Adjusted consideration in notes payable	$ 13.0
Description about notes payable	The notes payable are due in three equal installments to be paid on January 31st of 2021, 2022 and 2023 and are subordinate to the Company’s revolving line of credit.	The notes payable are due in three equal installments to be paid on January 31st of 2021, 2022 and 2023 and are subordinate to the Company’s revolving line of credit.