LOAN PORTFOLIO- Carrying Value of Purchased Credit Impaired Loans (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Financing Receivable Impaired [Line Items]
Purchased Credit Impaired Loans	$ 104,313		$ 4,791
Residential Mortgage Loans [Member]
Financing Receivable Impaired [Line Items]
Purchased Credit Impaired Loans	99,535	[1]	0
Commercial Mortgage Loans [Member]
Financing Receivable Impaired [Line Items]
Purchased Credit Impaired Loans	3,418	[1]	0
Consumer Credit Card Financing Receivable [Member]
Financing Receivable Impaired [Line Items]
Purchased Credit Impaired Loans	$ 1,360		$ 4,791

[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 amounted to $15.1 million, $179.0 million, $40.5 million, $0.5 million, and $1.7 million, respectively.