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Business Acquisitions - Risk Canvas Holdings, LLC - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended
	Jan. 07, 2019	Mar. 31, 2019	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill			$ 1,554,679	$ 1,574,466	$ 1,393,832
Acquisition related cost		$ 967
riskCanvas Holdings, LLC
Business Acquisition [Line Items]
Date of acquisition	Jan. 07, 2019
Ownership percentage acquired	100.00%
Purchase consideration	$ 5,747
Consideration payable			$ 0
Cash consideration to acquired certain assets and assumed certain liabilities	5,700
Acquisition related cost	967
Acquired assets	660
Liabilities assumed	707
riskCanvas Holdings, LLC | BCMI
Business Acquisition [Line Items]
Goodwill	2,547
riskCanvas Holdings, LLC | Customer-Related Intangible Assets
Business Acquisition [Line Items]
Intangible assets	1,700
riskCanvas Holdings, LLC | Software-Related Intangible Assets
Business Acquisition [Line Items]
Intangible assets	1,400
riskCanvas Holdings, LLC | Restrictive Covenants
Business Acquisition [Line Items]
Intangible assets	$ 100

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