LOAN PORTFOLIO- Carrying Value of Purchased Credit Impaired Loans (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Financing Receivable Impaired [Line Items]
Purchased Credit Impaired Loans	$ 181,114		$ 102,604
Residential Mortgage Loans [Member]
Financing Receivable Impaired [Line Items]
Purchased Credit Impaired Loans	177,601	[1]	98,494	[2]
Commercial Mortgage Loans [Member]
Financing Receivable Impaired [Line Items]
Purchased Credit Impaired Loans	3,279	[1]	3,393	[2]
Consumer Credit Card Financing Receivable [Member]
Financing Receivable Impaired [Line Items]
Purchased Credit Impaired Loans	$ 234		$ 717

[1] According to the Corporation's delinquency policy and consistent with the instructions for the preparation of the Consolidated Financial Statements for Bank Holding Companies (FR Y-9C) required by the Federal Reserve Board, residential mortgage, commercial mortgage, and construction loans are considered past due when the borrower is in arrears two or more monthly payments. FHA/VA government guaranteed loans, other residential mortgage loans, commercial mortgage loans, land loans and construction-residential loans past due 30-59 days as of March 31, 2015 amounted to $12.2 million, $177.4 million, $38.4 million, $6.1 million, and $1.6 million, respectively.

[2] According to the Corporation's delinquency policy and consistent with the instructions for the preparation of the Consolidated Financial Statements for Bank Holding Companies (FR Y-9C) required by the Federal Reserve Board, residential mortgage, commercial mortgage, and construction loans are considered past due when the borrower is in arrears two or more monthly payments. FHA/VA government guaranteed loans, other residential mortgage loans, commercial mortgage loans, land loans and construction-residential loans past due 30-59 days as of December 31, 2014 amounted to $14.0 million, $189.1 million, $20.8 million, $0.8 million and $1.0 million , respectively.