SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE - Securities Sold Under Agreements to Repurchase (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	$ 300,000	$ 300,000
short term debt [member]
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	0	0
long term debt [member]
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	$ 300,000	$ 300,000