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LOANS AND ALLOWANCE FOR LOAN LOSSES - Allowance for Loan and Lease Losses (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Jun. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Allowance for Loan and Lease Losses [Roll Forward]          
Balance at beginning of period $ 59,523   $ 56,678 $ 62,192 $ 49,333
Loans charged off (35,546)   (388) (39,060) (15,977)
Recoveries of loans and leases previously charged off 410   82 730 864
Net (charge-offs) recoveries (35,136)   (306) (38,330) (15,113)
Provision for (reversal of) loan losses 38,540 $ (1,987) 1,410 39,065 23,562
Balance at end of period $ 62,927 $ 59,523 $ 57,782 $ 62,927 $ 57,782