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		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
100% | Interest Income Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	$ 825	$ 881	$ 1,648	$ 1,937
100% | Other Interest Income Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	962	962	1,925	1,925
100% | Interest Expense Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(64)	(107)	(174)	(402)
100% | Other Fee Revenue [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	6,420	7,279	12,273	14,072
100% | Professional fees
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(37,855)	(37,122)	(74,514)	(75,800)
100% | Occupancy Net Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	1,673	1,797	3,355	3,604
100% | Other Operating Expense [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	190	297	403	666
100% | Total [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(27,849)	(26,013)	(55,084)	(53,998)
Majority interest | Interest Income Member
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	444	450	864	988
Majority interest | Other Interest Income Member
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	517	491	1,008	982
Majority interest | Interest Expense Member
Related Party Transaction [Line Items]
Related Party Transaction Expenses From Transactions With Related Party	(36)	(55)	(92)	(205)
Majority interest | Other Fee Revenue [Member]
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	3,460	3,712	6,445	7,177
Majority interest | Professional fees
Related Party Transaction [Line Items]
Related Party Transaction Expenses From Transactions With Related Party	(20,310)	(18,932)	(39,006)	(38,658)
Majority interest | Occupancy Net Member
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	900	917	1,758	1,838
Majority interest | Other Operating Expense [Member]
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	105	152	213	340
Majority interest | Total [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(14,920)	(13,265)	(28,810)	(27,538)
Elimination interest | Interest Income Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	381	431	784	949
Elimination interest | Other Interest Income Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	445	471	917	943
Elimination interest | Interest Expense Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(28)	(52)	(82)	(197)
Elimination interest | Other Fee Revenue [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	2,960	3,567	5,828	6,895
Elimination interest | Professional fees
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(17,545)	(18,190)	(35,508)	(37,142)
Elimination interest | Occupancy Net Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	773	880	1,597	1,766
Elimination interest | Other Operating Expense [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	85	145	190	326
Elimination interest | Total [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	$ (12,929)	$ (12,748)	$ (26,274)	$ (26,460)