Impact on the results of operations of transactions between the Corporation and EVERTEC (Detail) (Equity Method Investee Member, E V E R T E C Inc [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Scenario Actual Member | Interest Income Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	$ 854	$ 850	$ 2,502	$ 2,787
Scenario Actual Member | Other Interest Income Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	963	963	2,888	2,888
Scenario Actual Member | Interest Expense Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(45)	(136)	(219)	(538)
Scenario Actual Member | Other Fee Revenue [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	6,240	7,294	18,513	21,366
Scenario Actual Member | Professional Fees [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(36,173)	(36,185)	(110,687)	(111,985)
Scenario Actual Member | Occupancy Net Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	1,636	1,746	4,991	5,350
Scenario Actual Member | Other Operating Expense [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	141	390	544	1,056
Scenario Actual Member | Total [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(26,384)	(25,078)	(81,468)	(79,076)
Scenario Consolidated [Member] | Interest Income Member
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	440	433	1,304	1,421
Scenario Consolidated [Member] | Other Interest Income Member
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	496	491	1,504	1,473
Scenario Consolidated [Member] | Interest Expense Member
Related Party Transaction [Line Items]
Related Party Transaction Expenses From Transactions With Related Party	(23)	(69)	(115)	(274)
Scenario Consolidated [Member] | Other Fee Revenue [Member]
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	3,214	3,720	9,659	10,897
Scenario Consolidated [Member] | Professional Fees [Member]
Related Party Transaction [Line Items]
Related Party Transaction Expenses From Transactions With Related Party	(18,633)	(18,454)	(57,639)	(57,113)
Scenario Consolidated [Member] | Occupancy Net Member
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	842	890	2,600	2,729
Scenario Consolidated [Member] | Other Operating Expense [Member]
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	73	199	286	538
Scenario Consolidated [Member] | Total [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(13,591)	(12,790)	(42,401)	(40,329)
Eliminationsinterest [Member] | Interest Income Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	414	417	1,198	1,366
Eliminationsinterest [Member] | Other Interest Income Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	467	472	1,384	1,415
Eliminationsinterest [Member] | Interest Expense Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(22)	(67)	(104)	(264)
Eliminationsinterest [Member] | Other Fee Revenue [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	3,026	3,574	8,854	10,469
Eliminationsinterest [Member] | Professional Fees [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(17,540)	(17,731)	(53,048)	(54,872)
Eliminationsinterest [Member] | Occupancy Net Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	794	856	2,391	2,621
Eliminationsinterest [Member] | Other Operating Expense [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	68	191	258	518
Eliminationsinterest [Member] | Total [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	$ (12,793)	$ (12,288)	$ (39,067)	$ (38,747)