LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES - FORECLOSURE RECORDED INVESTMENT (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Recorded investment in residential and consumer loans based on payment activity
Loans and Leases Receivable Gross Carrying Amount	$ 3,823,031	$ 3,326,610
Residential Real Estate - Owner Occupied
Recorded investment in residential and consumer loans based on payment activity
Loans and Leases Receivable Gross Carrying Amount	1,028,471	1,081,934
Residential Real Estate - Owner Occupied | Foreclosure Proceedings In Process
Recorded investment in residential and consumer loans based on payment activity
Loans and Leases Receivable Gross Carrying Amount	$ 1,287	$ 4,602