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Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
	Jan. 31, 2021	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition
First and second lien debt		$ 38,971	$ 5,850
Goodwill		593,294		$ 560,332	$ 557,914
Knotel, Inc.
Business Acquisition
Debtor-in-possession facility financing costs	$ 19,800
First and second lien debt	39,293	39,300
Debtor-in-possession financing	19,788	19,800
Assumed liability	6,958	6,900
Total consideration transferred	66,039
Goodwill	$ 33,014	33,000
Business acquisition, amount deductible for tax		22,400
Knotel, Inc. | Restricted Stock Units (RSUs)
Business Acquisition
Shares issued as compensation		$ 66,000
2020 Acquisitions
Business Acquisition
Assumed liability				3,590
Total consideration transferred				9,839
Business acquisition, contingent non cash consideration, fair value				1,300
Contingent consideration cash				2,200
Goodwill				6,294
Business acquisition, amount deductible for tax				2,400
Business acquisition, aggregate revenue contribution			$ 1,900
2020 Acquisitions | Restricted Stock Units (RSUs)
Business Acquisition
First and second lien debt				5,900
Assumed liability				$ 400
Business acquisition, equity interest issued (in shares)				104,653

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