ALLOWANCE FOR CREDIT LOSSES ON LOANS AND FINANCE LEASES - Carrying Amount of Portfolios (Parenthetical) (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable Allowance For Credit Losses [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 11,552,825	$ 11,060,658
Commercial Portfolio Segment [Member] \| COVID-19 [Member] \| Small Business Administration [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 6,800	$ 145,000

Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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+ Details