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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Allowance for Loan and Lease Losses (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Allowance for Loan and Lease Losses [Roll Forward]        
Balance at beginning of period $ 56,678 $ 42,385 $ 49,333 $ 40,444
Loans and leases charged off (388) (959) (15,977) (4,214)
Recoveries of loans and leases previously charged off 82 85 864 195
Provision for loan and lease losses 1,410 3,561 23,562 8,647
Balance at end of period $ 57,782 $ 45,072 $ 57,782 $ 45,072