Business Combinations - Narrative (Details) $ in Thousands					3 Months Ended	4 Months Ended	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 29, 2021 USD ($)	Sep. 09, 2021 USD ($)	Oct. 01, 2020 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 738,900				$ 499,309	$ 738,900	$ 738,900	$ 499,309	$ 336,539
MarkeTouch Media
Acquired Finite-Lived Intangible Assets [Line Items]
Base purchase price	82,000					82,000	82,000
Acquisition related costs	1,200
Goodwill	42,530					42,530	42,530
Goodwill expected to be deductible for tax purposes	42,500					$ 42,500	$ 42,500
Total purchase price transferred	$ 82,626
MarkeTouch Media | Discount Rate
Acquired Finite-Lived Intangible Assets [Line Items]
Measurement input used in estimating the fair values of intangible assets	0.115					0.115	0.115
MarkeTouch Media | Acquired Technology | Royalty Rate
Acquired Finite-Lived Intangible Assets [Line Items]
Measurement input used in estimating the fair values of intangible assets	0.100					0.100	0.100
ReCept
Acquired Finite-Lived Intangible Assets [Line Items]
Base purchase price		$ 100,000
Acquisition related costs		2,500
Goodwill		81,588
Goodwill expected to be deductible for tax purposes		0
Total purchase price transferred		$ 102,466
ReCept | Discount Rate
Acquired Finite-Lived Intangible Assets [Line Items]
Measurement input used in estimating the fair values of intangible assets		0.150
FDS Amplicare
Acquired Finite-Lived Intangible Assets [Line Items]
Base purchase price			$ 177,000
Acquisition related costs							$ 7,000
Revenue from operations since the acquisition date						$ 11,300
Losses from operations since the acquisition date						$ 900
Goodwill			117,374
Goodwill expected to be deductible for tax purposes			0
Total purchase price transferred			$ 178,466
FDS Amplicare | Discount Rate
Acquired Finite-Lived Intangible Assets [Line Items]
Measurement input used in estimating the fair values of intangible assets			0.130
FDS Amplicare | Acquired Technology | Royalty Rate
Acquired Finite-Lived Intangible Assets [Line Items]
Measurement input used in estimating the fair values of intangible assets			0.100
FDS Amplicare | Trade Names | Royalty Rate
Acquired Finite-Lived Intangible Assets [Line Items]
Measurement input used in estimating the fair values of intangible assets			0.020
340B Link Business
Acquired Finite-Lived Intangible Assets [Line Items]
Acquisition related costs								$ 6,500
Revenue from operations since the acquisition date					10,200
Losses from operations since the acquisition date					$ 1,300
Goodwill				$ 160,268
Goodwill expected to be deductible for tax purposes				93,700
Total purchase price transferred				$ 225,000
340B Link Business | Discount Rate
Acquired Finite-Lived Intangible Assets [Line Items]
Measurement input used in estimating the fair values of intangible assets				0.140
340B Link Business | Acquired Technology | Royalty Rate
Acquired Finite-Lived Intangible Assets [Line Items]
Measurement input used in estimating the fair values of intangible assets				0.100
340B Link Business | Trade Names | Royalty Rate
Acquired Finite-Lived Intangible Assets [Line Items]
Measurement input used in estimating the fair values of intangible assets				0.005