LOANS AND LEASES - Non-Performing Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructurings	$ 53,714	$ 53,991
Non-Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	68,696	74,635
Troubled debt restructurings	24,820	23,481
Total non-performing loans	93,516	98,116
Other real estate owned	39,240	40,606
Total non-performing assets	$ 132,756	$ 138,722
Non-performing loans / total loans and leases	0.43%	0.47%
Non-performing loans OREO / total loans and leases OREO	0.61%	0.66%
Non-performing assets / total assets	0.41%	0.44%