LOAN PORTFOLIO - Selected Information on TDRs Includes Recorded Investment by Loan Class and Modification Type (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013		Jun. 30, 2013	Dec. 31, 2012
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 636,859	[1]	$ 613,129	$ 941,730
Interest Rate Below Market [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	80,438	[1]		160,144
Maturity of Term Extension [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	40,219	[1]		42,480
Combination of reduction in interest rate and extension of maturity [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	392,312	[1]		494,071
Forgiveness of principal and/or interest [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	7,372	[1]		58,806
Foberance Agrrements [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment				71,390	[2]
Other [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	116,518	[1],[3]		114,839	[4]
Non Fha Va Residential Mortgage Loans [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	334,955			411,884
Non Fha Va Residential Mortgage Loans [Member] | Interest Rate Below Market [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	22,907			21,288
Non Fha Va Residential Mortgage Loans [Member] | Maturity of Term Extension [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	6,455			4,178
Non Fha Va Residential Mortgage Loans [Member] | Combination of reduction in interest rate and extension of maturity [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	273,691			338,731
Non Fha Va Residential Mortgage Loans [Member] | Forgiveness of principal and/or interest [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	0			0
Non Fha Va Residential Mortgage Loans [Member] | Foberance Agrrements [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment				0	[2]
Non Fha Va Residential Mortgage Loans [Member] | Other [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	31,902	[3]		47,687	[4]
Commercial Mortgage Loans [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	154,460			287,663
Commercial Mortgage Loans [Member] | Interest Rate Below Market [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	37,960			103,203
Commercial Mortgage Loans [Member] | Maturity of Term Extension [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	13,033			15,578
Commercial Mortgage Loans [Member] | Combination of reduction in interest rate and extension of maturity [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	84,989			105,695
Commercial Mortgage Loans [Member] | Forgiveness of principal and/or interest [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	7			46,855
Commercial Mortgage Loans [Member] | Foberance Agrrements [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment				0	[2]
Commercial Mortgage Loans [Member] | Other [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	18,471	[3]		16,332	[4]
Commercial And Industrial Loan [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	101,956			133,069
Commercial And Industrial Loan [Member] | Interest Rate Below Market [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	12,304			28,761
Commercial And Industrial Loan [Member] | Maturity of Term Extension [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	16,371			15,567
Commercial And Industrial Loan [Member] | Combination of reduction in interest rate and extension of maturity [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	7,188			26,054
Commercial And Industrial Loan [Member] | Forgiveness of principal and/or interest [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	7,365			11,951
Commercial And Industrial Loan [Member] | Foberance Agrrements [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment				9,492	[2]
Commercial And Industrial Loan [Member] | Other [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	58,728	[3]		41,244	[4]
Construction Loans [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	19,326			86,193
Construction Loans [Member] | Interest Rate Below Market [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	6,911			6,441
Construction Loans [Member] | Maturity of Term Extension [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	2,212			4,195
Construction Loans [Member] | Combination of reduction in interest rate and extension of maturity [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	8,996			9,160
Construction Loans [Member] | Forgiveness of principal and/or interest [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	0			0
Construction Loans [Member] | Foberance Agrrements [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment				61,898	[2]
Construction Loans [Member] | Other [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	1,207	[3]		4,499	[4]
Consumer Auto Loans [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	13,730			11,432
Consumer Auto Loans [Member] | Interest Rate Below Market [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	0			0
Consumer Auto Loans [Member] | Maturity of Term Extension [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	773			1,012
Consumer Auto Loans [Member] | Combination of reduction in interest rate and extension of maturity [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	8,446			7,452
Consumer Auto Loans [Member] | Forgiveness of principal and/or interest [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	0			0
Consumer Auto Loans [Member] | Foberance Agrrements [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment				0	[2]
Consumer Auto Loans [Member] | Other [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	4,511	[3]		2,968	[4]
Finance Leases [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	2,290			2,019
Finance Leases [Member] | Interest Rate Below Market [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	0			0
Finance Leases [Member] | Maturity of Term Extension [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	1,066			1,512
Finance Leases [Member] | Combination of reduction in interest rate and extension of maturity [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	1,224			507
Finance Leases [Member] | Forgiveness of principal and/or interest [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	0			0
Finance Leases [Member] | Foberance Agrrements [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment				0	[2]
Finance Leases [Member] | Other [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	0	[3]		0	[4]
Other Consumer Loans [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	10,142			9,470
Other Consumer Loans [Member] | Interest Rate Below Market [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	356			451
Other Consumer Loans [Member] | Maturity of Term Extension [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	309			438
Other Consumer Loans [Member] | Combination of reduction in interest rate and extension of maturity [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	7,778			6,472
Other Consumer Loans [Member] | Forgiveness of principal and/or interest [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	0			0
Other Consumer Loans [Member] | Foberance Agrrements [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment				0	[2]
Other Consumer Loans [Member] | Other [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 1,699	[3]		$ 2,109	[4]

[1]  Included in the bulk sales of assets completed during the first half of 2013 was $188.1 million of TDRs, and the transfer of loans to held for sale included TDRs with a book value of $158.4 million at the time of the transfer. The carrying value of TDRs held for sale amounted to $71.0 million as of September 30, 2013.

[2]  Mainly related to one construction relationship amounting to $53.4 million transferred to held for sale in 2013.

[3] Represents common shares of another financial institution in Puerto Rico.

[4]  Other concessions granted by the Corporation include deferral of principal and/or interest payments for a period longer than what would be considered insignificant, payment plans under judicial stipulation or a combination of the concessions listed in the table.