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, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
100% | Interest Income Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	$ 1,638	$ 825	$ 2,491	$ 1,648
100% | Other Interest Income Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	306	962	1,269	1,925
100% | Interest Expense Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(30)	(64)	(57)	(174)
100% | Other Fee Revenue [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	6,364	6,420	12,389	12,273
100% | Net Gain Loss And Valuation Adjustments On Investment Securities [Member]
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	5,856		5,856
100% | Other Income [Member]
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	9,854		9,854
100% | Occupancy Net Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	1,683	1,673	3,364	3,355
100% | Professional Fees [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(38,399)	(37,855)	(76,275)	(74,514)
100% | Other Operating Expense [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	226	190	430	403
100% | Total [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(12,502)	(27,849)	(40,679)	(55,084)
Amount net of eliminations | Interest Income Member
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	1,107	444	1,684	864
Amount net of eliminations | Other Interest Income Member
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	207	517	858	1,008
Amount net of eliminations | Interest Expense Member
Related Party Transaction [Line Items]
Related Party Transaction Expenses From Transactions With Related Party	(21)	(36)	(39)	(92)
Amount net of eliminations | Other Fee Revenue [Member]
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	4,303	3,460	8,377	6,445
Amount net of eliminations | Net Gain Loss And Valuation Adjustments On Investment Securities [Member]
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	3,960		3,960
Amount net of eliminations | Other Income [Member]
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	6,664		6,664
Amount net of eliminations | Occupancy Net Member
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	1,138	900	2,275	1,758
Amount net of eliminations | Professional Fees [Member]
Related Party Transaction [Line Items]
Related Party Transaction Expenses From Transactions With Related Party	(25,965)	(20,310)	(51,577)	(39,006)
Amount net of eliminations | Other Operating Expense [Member]
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	153	105	291	213
Amount net of eliminations | Total [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(8,454)	(14,920)	(27,507)	(28,810)
Elimination interest | Interest Income Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(531)	(381)	(807)	(784)
Elimination interest | Other Interest Income Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(99)	(445)	(411)	(917)
Elimination interest | Interest Expense Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	9	28	18	82
Elimination interest | Other Fee Revenue [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(2,061)	(2,960)	(4,012)	(5,828)
Elimination interest | Net Gain Loss And Valuation Adjustments On Investment Securities [Member]
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	(1,896)		(1,896)
Elimination interest | Other Income [Member]
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	(3,190)		(3,190)
Elimination interest | Occupancy Net Member
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(545)	(773)	(1,089)	(1,597)
Elimination interest | Professional Fees [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	12,434	17,545	24,698	35,508
Elimination interest | Other Operating Expense [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(73)	(85)	(139)	(190)
Elimination interest | Total [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	$ 4,048	$ 12,929	$ 13,172	$ 26,274