MORTGAGE BANKING ACTIVITIES (Unpaid principal balance of residential mortgage loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Other assets	$ 80,281	$ 65,550
Other liabilities	70,044	50,678
Loans held for sale, at fair value	82,598	$ 9,509
Fair value	83,868
Residential Mortgage [Member]
Loans held-for-sale	80,535
Loans held for sale, at fair value	82,598
Residential Mortgage [Member] | Loan Commitments (IRLCs) [Member]
Other assets	131,007
Other assets fair value	3,898
Residential Mortgage [Member] | Forward Sales Contracts [Member]
Other liabilities	115,500
Other liabilities at fair value	$ (2,628)