INTANGIBLE ASSETS (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	$ 8,555
Finite-Lived Intangible Assets, Accumulated Amortization	(66,065)		$ (63,214)	$ (51,808)
Indefinite-lived Intangible Assets (Excluding Goodwill)	19,997		19,997	24,013
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	19,179
Finite-Lived Intangible Assets, Amortization Expense, Year Three	9,801
Finite-Lived Intangible Assets, Amortization Expense, Year Two	11,048
Finite-Lived Intangible Assets, Amortization Expense, Year Four	9,452
Finite-Lived Intangible Assets, Amortization Expense, Year Five	9,452
Intangible Assets, Net (Excluding Goodwill)	87,485		90,336
Intangible Assets, Gross (Excluding Goodwill)	153,550		153,550	156,956
Amortization of Intangible Assets, IA	(2,852)	$ (2,852)	(11,406)
Indefinite-lived Intangible Assets, Purchase Accounting Adjustments			(4,016)
Employee Benefits and Share-based Compensation	2,717	$ 2,473
Contract with Customer, Liability, Revenue Recognized	2,738
Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	(50,231)		(48,285)	(40,501)
Finite-Lived Intangible Assets, Gross	98,353		98,353	98,469
Finite-Lived Intangible Assets, Net	$ 48,122		$ 50,068
Finite-Lived Intangible Asset, Useful Life	11 years		11 years
Amortization of Intangible Assets, IA	$ (1,946)		$ (7,784)
Finite-Lived Intangible Assets, Purchase Accounting Adjustments			(116)
Customer-Related Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	(12,070)		(11,464)	(9,036)
Finite-Lived Intangible Assets, Gross	23,391		23,391	23,819
Finite-Lived Intangible Assets, Net	$ 11,321		$ 11,927
Finite-Lived Intangible Asset, Useful Life	10 years		10 years
Amortization of Intangible Assets, IA	$ (606)		$ (2,428)
Finite-Lived Intangible Assets, Purchase Accounting Adjustments			(428)
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	(3,764)		(3,465)	(2,271)
Finite-Lived Intangible Assets, Gross	11,809		11,809	$ 10,655
Finite-Lived Intangible Assets, Net	$ 8,045		$ 8,344
Finite-Lived Intangible Asset, Useful Life	10 years		10 years
Amortization of Intangible Assets, IA	$ (299)		$ (1,194)
Finite-Lived Intangible Assets, Purchase Accounting Adjustments			$ 1,154