LOANS - Narrative (Detail) - USD ($) $ in Thousands		12 Months Ended
	Apr. 01, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Loans and Leases Receivable Disclosure [Line Items]
Unearned income and deferred fees		$ 14,300	$ 24,500
Loans receivable with a gross amortized cost basis	$ 2,500,000
PCD Loans acquired	974,800
Initial allowance on Revere PCD loans	18,600	0	18,628	$ 0
Fair value premium	4,500
Total fair value of PCD loans as of the acquisition date	960,700
Non-PCD loans	1,500,000
Net fair value premium	$ 2,100
Paycheck Protection Program
Loans and Leases Receivable Disclosure [Line Items]
Unearned income and deferred fees		$ 4,600	$ 21,200