Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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Amount of liability recognized arising from contingent consideration in a business combination.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The number of businesses acquired by the entity during the period.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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The period over which amortization of contingent consideration liability.

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GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Goodwill (Detail) $ in Thousands	3 Months Ended	6 Months Ended	9 Months Ended
	Mar. 31, 2020 USD ($)	Jun. 30, 2020 USD ($) item	Sep. 30, 2020 USD ($) item	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Goodwill activity
Beginning balance	$ 180,424	$ 180,424	$ 180,424	$ 173,904
Additions from acquisitions			68,534	6,520
Ending balance			248,958	$ 180,424
Assets acquired
Number of acquisitions during the period \| item		3
Intangible assets acquired			$ 2,000		$ 2,500
Weighted average amortization period			4 years 2 months 12 days
2020 Acquisitions
Assets acquired
Stock issued	$ 5,000
Debt Brokerage Companies
Assets acquired
Number of acquisitions during the period \| item			3
Total consideration transferred			$ 69,400
Cash consideration			46,800
Stock issued			5,000
Contingent consideration			$ 17,600
Debt Brokerage Company One
Assets acquired
Amortization period			4 years
Debt Brokerage Company Two
Assets acquired
Amortization period			5 years