LOAN PORTFOLIO- Carrying Value of Purchased Credit Impaired Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Financing Receivable Impaired [Line Items]
Purchased Credit Impaired Loans	$ 165,818	[1]	$ 173,913	[2]	$ 102,604
Allowance for losses purchased credit impaired	(6,857)		(3,962)		$ 0
Purchased Credit Impaired Loans, Net	158,961		169,951
Residential Mortgage Loans [Member]
Financing Receivable Impaired [Line Items]
Purchased Credit Impaired Loans	162,676		170,766
Commercial Mortgage Loans [Member]
Financing Receivable Impaired [Line Items]
Purchased Credit Impaired Loans	$ 3,142	[3]	$ 3,147	[4]

[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 and commercial mortgage loans are considered past due when the borrower is in arrears two or more monthly payments. PCI residential mortgage loans and commercial mortgage loans past due 30-59 days as of December 31, 2016 amounted to $22.3 million and $0.1 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 and commercial mortgage loans are considered past due when the borrower is in arrears two or more monthly payments. PCI residential mortgage loans past due 30-59 days as of December 31, 2015 amounted to $23.6 million.

[3] 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 and other 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, 2016 amounted to $9.9 million, $142.8 million, $4.6 million, $0.7 million, and $0.4 million, respectively.

[4] 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 and other 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, 2015 amounted to $11.0 million, $162.9 million, $38.6 million, $5.7 million, and $0.8 million, respectively.