Acquisitions - Additional Information (Detail) - USD ($)			1 Months Ended	3 Months Ended		12 Months Ended
	Feb. 21, 2019	Feb. 06, 2019	Jan. 31, 2020	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Business Acquisition [Line Items]
Acquisition related costs				$ 2,500,000	$ 3,900,000
Acquisition related retention-based bonus payment expense				2,500,000	3,000,000.0
Acquisition related transaction, transition and integration-related costs					900,000
Cash consideration					$ 22,463,000
Goodwill				2,413,611,000		$ 2,414,287,000
Contingent consideration paid				$ 1,294,000
Israeli-based Company [Member]
Business Acquisition [Line Items]
Business acquisition date				Feb. 06, 2019
Cash consideration		$ 5,000,000.0
Contingent Consideration recorded as an estimated fair value		$ 3,200,000
Period over which company expects to make payments		2 years
Purchase consideration		$ 8,200,000
Goodwill		3,100,000
Contingent consideration paid			$ 2,000,000.0			2,000,000.0
Israeli-based Company [Member] \| Retention Milestone [Member]
Business Acquisition [Line Items]
Contingent consideration paid				$ 1,000,000.0
Israeli-based Company [Member] \| Maximum [Member]
Business Acquisition [Line Items]
Contingent consideration		4,000,000.0
Israeli-based Company [Member] \| Maximum [Member] \| Retention Milestone [Member]
Business Acquisition [Line Items]
Contingent consideration						$ 2,000,000.0
Israeli-based Company [Member] \| Completed Technology [Member]
Business Acquisition [Line Items]
Intangible assets		$ 5,100,000
California-based Company [Member]
Business Acquisition [Line Items]
Cash consideration	$ 17,500,000
Period over which company expects to make payments	3 years
Purchase consideration	$ 17,500,000
Goodwill	8,700,000
Other Current assets	100,000
Current liabilities	300,000
Long-term deferred tax liability	2,900,000
California-based Company [Member] \| Retention Milestone [Member]
Business Acquisition [Line Items]
Contingent consideration paid				$ 1,900,000
California-based Company [Member] \| Maximum [Member] \| Retention Milestone [Member]
Business Acquisition [Line Items]
Contingent consideration	4,400,000
California-based Company [Member] \| Completed Technology [Member]
Business Acquisition [Line Items]
Intangible assets	$ 11,800,000

LogMeIn, Inc. 10-Q