LOAN PORTFOLIO - Credit Risk Payment Activity (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	$ 9,262,436		$ 9,636,170
Consumer Auto Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	1,060,782		1,112,320
Finance Leases [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	232,126		245,323
Residential Real Estate [Member] | Fhava Guaranteed Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	153,570	[1]	195,226	[2]
Residential Real Estate [Member] | Other Residential Mortgage Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	2,857,617		2,353,782
Residential Real Estate [Member] | Performing Financing Receivable [Member] | Fhava Guaranteed Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	153,570	[1]	195,226	[2]
Residential Real Estate [Member] | Performing Financing Receivable [Member] | Other Residential Mortgage Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	2,578,416		2,192,341
Residential Real Estate [Member] | Purchased Credit Impaired [Member] | Fhava Guaranteed Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	0	[1],[3]	0	[2],[4]
Residential Real Estate [Member] | Purchased Credit Impaired [Member] | Other Residential Mortgage Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	98,494	[3]	0	[4]
Residential Real Estate [Member] | Nonperforming Financing Receivable [Member] | Fhava Guaranteed Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	0	[1]	0	[2]
Residential Real Estate [Member] | Nonperforming Financing Receivable [Member] | Other Residential Mortgage Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	180,707		161,441
Consumer [Member] | Consumer Auto Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	1,060,782		1,112,320
Consumer [Member] | Finance Leases [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	232,126		245,323
Consumer [Member] | Other Consumer Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	689,637		708,876
Consumer [Member] | Performing Financing Receivable [Member] | Consumer Auto Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	1,038,506		1,091,004
Consumer [Member] | Performing Financing Receivable [Member] | Finance Leases [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	226,881		242,241
Consumer [Member] | Performing Financing Receivable [Member] | Other Consumer Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	673,626		688,181
Consumer [Member] | Purchased Credit Impaired [Member] | Consumer Auto Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	0	[3]	0	[4]
Consumer [Member] | Purchased Credit Impaired [Member] | Finance Leases [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	0	[3]	0	[4]
Consumer [Member] | Purchased Credit Impaired [Member] | Other Consumer Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	717	[3]	4,791	[4]
Consumer [Member] | Nonperforming Financing Receivable [Member] | Consumer Auto Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	22,276		21,316
Consumer [Member] | Nonperforming Financing Receivable [Member] | Finance Leases [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	5,245		3,082
Consumer [Member] | Nonperforming Financing Receivable [Member] | Other Consumer Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable gross carrying value	$ 15,294		$ 15,904

[1] It is the Corporation's policy to report delinquent residential mortgage loans insured by the FHA or guaranteed by the VA as past due loans 90 days and still accruing as opposed to non-performing loans since the principal repayment is insured. These balances include $40.4 million of residential mortgage loans insured by the FHA or guaranteed by the VA that are over 18 months delinquent, and are no longer accruing interest as of December 31, 2014.

[2] It is the Corporation's policy to report delinquent residential mortgage loans insured by the FHA or guaranteed by the VA as past due loans 90 days and still accruing as opposed to non-performing loans since the principal repayment is insured.  These balances include $37.0 million of residential mortgage loans insured by the FHA or guaranteed by the VA that are  over 18 months delinquent, and are no longer accruing interest as of December 31, 2013.

[3] PCI loans are excluded from non-performing statistics due to the application of the accretion method, under which these loans will accrete interest income over the remaining life of the loans using estimated cash flow analysis.

[4] PCI loans are excluded from non-performing statistics due to the application of the accretion method, under which these loans will accrete interest income over the remaining life of the loans using estimated cash flow analysis.