Business Combinations - Additional Information (Details) $ in Thousands			1 Months Ended	12 Months Ended
	Aug. 30, 2019 USD ($)	Apr. 18, 2019 USD ($)	Aug. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Business Acquisition [Line Items]
Goodwill				$ 261,116	$ 236,225	$ 220,420
Developed Technology | Minimum
Business Acquisition [Line Items]
Identifiable intangible assets estimated useful life				1 year	4 years
Developed Technology | Maximum
Business Acquisition [Line Items]
Identifiable intangible assets estimated useful life				5 years	5 years
Scriptcycle LLC
Business Acquisition [Line Items]
Date of acquisition			Aug. 31, 2020
Business combination, aggregate consideration			$ 58,300
Estimated fair value of contingent consideration			800
Contingent consideration based on achievement of certain revenue thresholds			2,900	$ 2,900
Goodwill			24,900
Identifiable intangible assets related to acquisition			28,300
Acquired current assets			5,900
Assumed liabilities			1,100
Scriptcycle LLC | Customer Related Intangible Assets
Business Acquisition [Line Items]
Identifiable intangible assets related to acquisition			$ 25,300
Identifiable intangible assets estimated useful life			11 years
Scriptcycle LLC | Developed Technology and Tradename
Business Acquisition [Line Items]
Identifiable intangible assets related to acquisition			$ 3,000
Scriptcycle LLC | Developed Technology and Tradename | Minimum
Business Acquisition [Line Items]
Identifiable intangible assets estimated useful life			1 year
Scriptcycle LLC | Developed Technology and Tradename | Maximum
Business Acquisition [Line Items]
Identifiable intangible assets estimated useful life			9 years
Scriptcycle LLC | Measurement Input, Discount Rate
Business Acquisition [Line Items]
Business combination consideration discounted rate			5.4
Sappira Inc.
Business Acquisition [Line Items]
Date of acquisition		Apr. 18, 2019
Business combination, aggregate consideration		$ 14,300
Goodwill		9,300
Identifiable intangible assets related to acquisition		4,200
Acquired current assets		2,100
Assumed liabilities		$ 500
Percentage of outstanding shares acquired		100.00%
Consideration placed in escrow for potential breaches		$ 1,400
Sappira Inc. | Developed Technology
Business Acquisition [Line Items]
Identifiable intangible assets related to acquisition		$ 3,100
Identifiable intangible assets estimated useful life		4 years
Sappira Inc. | Trademarks and Backlog
Business Acquisition [Line Items]
Identifiable intangible assets related to acquisition		$ 1,100
Sappira Inc. | Trademarks and Backlog | Minimum
Business Acquisition [Line Items]
Identifiable intangible assets estimated useful life		1 year
Sappira Inc. | Trademarks and Backlog | Maximum
Business Acquisition [Line Items]
Identifiable intangible assets estimated useful life		7 years
FocusScript LLC
Business Acquisition [Line Items]
Date of acquisition	Aug. 30, 2019
Business combination, aggregate consideration	$ 18,700
FocusScript LLC | Developed Technology
Business Acquisition [Line Items]
Goodwill	6,500
Identifiable intangible assets related to acquisition	$ 12,200
Identifiable intangible assets estimated useful life	4 years