INCOME TAXES- Significant components of deferred tax assets and liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred Tax Assets [Abstract]
NOL and capital losses carryforward	$ 137,860	$ 220,496
Allowance for credit losses	105,917	151,586
Alternative Minimum Tax credits available for carryforwards	37,361	27,396
Unrealized loss on OREO valuation	7,703	13,426
Settlement payment - closing agreement	7,031	7,031
Legal and other reserves	4,576	4,120
Reserve for insurance premium cancellations	881	941
Differences between the assigned values and tax bases of assets and liabilities recognized in purchase business combinations	8,926	11,956
Unrealized loss on available-for-sale securities, net	14,181	0
Other	4,420	8,647
Total gross deferred tax asset	328,856	445,599
Deferred Tax Liabilities [Abstract]
Servicing assets	10,510	9,571
Pension plan assets	2,035	0
Unrealized gain on available-for-sale securities, net	0	4,730
Other	506	53
Deferred tax liability	13,051	14,354
Valuation allowance	(107,323)	(101,984)
Net deferred tax asset	$ 208,482	$ 329,261