DEPOSITS DEPOSITS (Maturities and Weighted Average Interest Rates of Certificates of Deposit) (Details) - USD ($) $ in Thousands		Mar. 31, 2020	Dec. 31, 2019
Maturities of Time Deposits [Abstract]
Maturing in one year or less		$ 887,586
Maturing after one year through two years		175,730
Maturing after two years through three years		76,073
Maturing after three years through four years		11,742
Maturing after four years through five years		12,652
Maturing after five years		2,523
Total certificates of deposit	[1]	$ 1,166,306	$ 1,120,403
Weighted Average Rate [Abstract]
Maturing in one year or less		1.24%
Maturing after one year through two years		1.76%
Maturing after two years through three years		1.81%
Maturing after three years through four years		1.97%
Maturing after four years through five years		1.97%
Maturing after five years		1.14%
Total certificates of deposit		1.37%

[1] Certificates of deposit include $206,000 and $269,000 of acquisition premiums at March 31, 2020 and December 31, 2019, respectively.