LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES - FORECLOSURE RECORDED INVESTMENT (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Recorded investment in residential and consumer loans based on payment activity
Loans and Leases Receivable Gross Carrying Amount	$ 4,433,151	$ 4,148,227
Residential Real Estate - Owner Occupied
Recorded investment in residential and consumer loans based on payment activity
Loans and Leases Receivable Gross Carrying Amount	949,568	1,001,832
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	$ 2,201	$ 3,293