LOANS (Additional Information) (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Loans [Abstract]
Initial allowance on acquired Revere PCD loans	$ 18,628	$ 0
Fair value premium	4,500
PCD Loans acquired	974,800
Loans receivable with a gross amortized cost basis	2,500,000
Total fair value of PCD loans as of the Acquisition Date	960,700
PCD loans non-accruing at the time of acquisition	11,300
Non-PCD loans	1,500,000
Net fair value premium	2,100
Loans [Line Items]
Loans and Leases Receivable Deferred Income	31,900		$ 1,800
Paycheck Protection Program [Member]
Loans [Line Items]
Loans and Leases Receivable Deferred Income	$ 28,900