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LOAN PORTFOLIO -Changes in Carrying Amount Of Purchased Credit Impaired Loans (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Financing Receivable Impaired [Line Items]      
Beggining balance: purchased credit-impaired loans $ 165,818 [1] $ 173,913  
Accretion recognized in earnings 10,810 11,533  
Purchased Credit Impaired Loans Principal Collections (15,400) (17,184)  
Purchased Credit Impaired Loans Foreclosures (3,054) (2,444)  
Ending balance: purchased credit-impaired loans 158,174 [2] 165,818 [1]  
Allowance for losses purchased credit impaired (11,251) (6,857) $ (3,962)
Purchased Credit Impaired Loans, Net $ 146,923 $ 158,961  
[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 and commercial mortgage loans past due 30-59 days as of December 31, 2017 amounted to $28.1 million and $0.2 million, respectively.