INCOME TAXES- Significant components of deferred tax assets and liabilities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Deferred Tax Assets [Abstract]
Allowance for loan and lease losses	$ 79,330	$ 87,769
Unrealized losses on derivative activities	78	48
Legal reserve	1,807	2,953
Reserve for insurance premium cancellations	724	631
Net operating loss and donation carryforward available	374,091	378,160
Impairment on investments	4,438	3,178
Tax credits available for carryforward	8,006	10,714
Unrealized net loss on equity investments	187	6,236
Unrealized net loss on available for sale securities	502	739
Settlement payment - closing agreement	7,313	7,313
Unrealized net loss on REO valuation	11,467	11,633
Other	15,642	17,993
Deferred tax asset	503,585	527,367
Valuation allowance	(207,216)	(201,706)
Total deferred tax assets, net of valuation allowance	296,369	325,661
Deferred Tax Liabilities [Abstract]
Differences between the assigned values and tax bases of assets and liabilities recognized in purchase business combinations	5,247	5,712
Unrealized gain on other investments	468	468
Other	8,997	8,218
Deferred tax liability	14,712	14,398
Deferred income taxes, net	281,657	311,263
Reconciliation of the Change in Unrecognized Tax Benefits [Abstracts]
Balance at beginning of year	0	0	$ 4,310
Increases related to positions taken during prior years	0	0	(1,763)
Audit settlement	0	0	2,547
Balance at end of year	$ 0	$ 0	$ 0