LOANS AND LEASES - Non-Performing Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructurings	$ 54,192	$ 46,933
Non-Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	88,391	65,479
Troubled debt restructurings	23,147	20,428
Total non-performing loans	111,538	85,907
Other real estate owned (OREO)	35,416	32,490
Total non-performing assets	$ 146,954	$ 118,397
Non-performing loans / total loans and leases	0.54%	0.58%
Non-performing loans OREO / total loans and leases OREO	0.70%	0.79%
Non-performing assets / of total assets	0.47%	0.54%