Financial Condition accounts outstanding with EVERTEC (Detail) (E V E R T E C Inc [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Scenario Actual Member
Related Party Transaction [Line Items]
Total	$ 32,342	$ 24,375
Scenario Actual Member | Loan
Related Party Transaction [Line Items]
Loans	53,493	53,215
Scenario Actual Member | Securities Investment Member
Related Party Transaction [Line Items]
Investment securities	35,000	35,000
Scenario Actual Member | Deposits Member
Related Party Transaction [Line Items]
Deposits	44,659	54,288
Scenario Actual Member | Other Assets Member
Related Party Transaction [Line Items]
Accounts Receivable Related Parties	3,321	5,132
Scenario Actual Member | Other Liabilities Member
Related Party Transaction [Line Items]
Accounts payable (Other liabilities)	14,813	14,684
Scenario Consolidated [Member]
Related Party Transaction [Line Items]
Total	16,663	12,431
Scenario Consolidated [Member] | Loan
Related Party Transaction [Line Items]
Loans	27,560	27,140
Scenario Consolidated [Member] | Securities Investment Member
Related Party Transaction [Line Items]
Investment securities	18,032	17,850
Scenario Consolidated [Member] | Deposits Member
Related Party Transaction [Line Items]
Deposits	23,008	27,687
Scenario Consolidated [Member] | Other Assets Member
Related Party Transaction [Line Items]
Accounts Receivable Related Parties	1,711	2,617
Scenario Consolidated [Member] | Other Liabilities Member
Related Party Transaction [Line Items]
Accounts payable (Other liabilities)	7,632	7,489
Eliminationsinterest [Member]
Related Party Transaction [Line Items]
Total	15,679	11,944
Eliminationsinterest [Member] | Loan
Related Party Transaction [Line Items]
Loans	25,933	26,075
Eliminationsinterest [Member] | Securities Investment Member
Related Party Transaction [Line Items]
Investment securities	16,968	17,150
Eliminationsinterest [Member] | Deposits Member
Related Party Transaction [Line Items]
Deposits	21,651	26,601
Eliminationsinterest [Member] | Other Assets Member
Related Party Transaction [Line Items]
Accounts Receivable Related Parties	1,610	2,515
Eliminationsinterest [Member] | Other Liabilities Member
Related Party Transaction [Line Items]
Accounts payable (Other liabilities)	$ 7,181	$ 7,195