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LOAN PORTFOLIO - Breakdown Between Accrual and Nonaccrual Status of TDRs (Parenthetical) (Detail) - USD ($)
$ in Thousands
Sep. 30, 2018
Jun. 30, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Dec. 31, 2016
Financing Receivable Modifications [Line Items]            
Total TDR loans $ 625,720 $ 557,196 $ 587,219 $ 585,795 $ 568,543 $ 647,048
Non Accrual [Member]            
Financing Receivable Modifications [Line Items]            
Total TDR loans 114,874 [1]   212,524 [2]      
Performing Financing Receivable [Member] | Non Accrual [Member]            
Financing Receivable Modifications [Line Items]            
Total TDR loans $ 20,700   $ 88,600      
[1]
Excludes a construction TDR loan held for sale of $27.0 million as of September 30, 2018.
[2]
Included in non-accrual loans are $88.6 million in loans that were performing under the terms of the restructuring agreement but are reported in non-accrual status until the restructured loans meet the criteria of sustained payment performance under the revised terms for reinstatement to accrual status and are deemed fully collectible.