DEPOSITS (Maturities and Weighted Average Interest Rates of Certificates of Deposit) (Details) - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018
Maturities of Time Deposits [Abstract]
Maturing in one year or less		$ 846,941
Maturing after one year through two years		167,857
Maturing after two years through three years		79,422
Maturing after three years through four years		11,374
Maturing after four years through five years		12,561
Maturing after five years		2,248
Total certificates of deposit	[1]	$ 1,120,403	$ 1,320,265
Weighted Average Rate [Abstract]
Maturing in one year or less		1.28%
Maturing after one year through two years		1.77%
Maturing after two years through three years		1.97%
Maturing after three years through four years		1.75%
Maturing after four years through five years		2.23%
Maturing after five years		1.18%
Total certificates of deposits		1.43%

[1] )Certificates of deposit included $269,000 of acquisition discounts at December 31, 2019 and $563,000 of acquisition premiums at December 31, 2018.