LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Nonaccrual Loans and Loans Past Due 90 Days Still on Accrual (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans past due 90 days or more and still accruing	$ 0	$ 0
Nonaccrual loans and leases	35,223	45,129
Specific allowance on non accrual loans	0	0
Non-Traditional Mortgages (NTM)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans past due 90 days or more and still accruing	0	0
Nonaccrual loans and leases	11,390	14,703
Traditional Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans past due 90 days or more and still accruing	0	0
Nonaccrual loans and leases	$ 23,833	$ 30,426