MORTGAGE SERVICING RIGHTS - Summary of Components of Net Carrying Value of Acquired and Originated MSRs (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Mortgage Servicing Rights Acquired and Originated
Gross value	$ 1,201,542	$ 1,100,439
Accumulated amortization	(482,743)	(430,293)
Net carrying value	718,799	$ 670,146
MSRs
Mortgage Servicing Rights Acquired and Originated
Net carrying value	$ 718,799

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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