LOAN PORTFOLIO - Loan Restructuring and Effect on Allowance for Loan and Lease Losses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
Financing Receivable Allowance For Credit Losses [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 647,048	$ 661,591	$ 694,453	[1]	$ 630,258
Provision for loan and lease losses	86,733	172,045	109,530
Allowance for loan losses at end of year	205,603	240,710
Loans Split [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Financing Receivable, Modifications, Recorded Investment	36,971	39,329	46,032
Amount charged-off	0	0	(7,501)
Provision for loan and lease losses	4,279	131	(8,341)
Allowance for loan losses at end of year	$ 5,141	$ 862	$ 731

[1] Excludes TDRs held for sale amounting to $45.7 million as of December 31, 2014.