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LOAN PORTFOLIO - Activity for Impaired Loans (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Loan and Lease Receivables, Impaired [Abstract]        
Balance at beginning of period $ 732,871 $ 746,280 $ 760,269 $ 790,308
Loans determined impaired during the period 11,653 34,273 22,355 95,681
Charge-offs (15,627) (13,207) (29,048) (30,420)
Loans sold, net charge-offs 0 0 0 (4,121)
Increases to existing impaired loans 362 77 1,615 7,075
Foreclosures (4,950) (7,777) (12,934) (19,452)
Loans no longer considered impaired (551) (2,433) (703) (3,940)
Loans transferred to held for sale 0 0 0 (57,213)
Paid in full or partial payments (11,930) (17,079) (29,726) (37,784)
Balance at end of period $ 711,828 $ 740,134 $ 711,828 $ 740,134