REPURCHASE AGREEMENTS (Details) - USD ($) $ in Thousands		Mar. 31, 2020	Dec. 31, 2019
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements		$ 265,997	$ 237,984
March 31, 2020
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	[1],[2]	265,997	237,984
Obligations of states and political subdivisions | March 31, 2020
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	[1],[2]	1,616	1,361
Mortgage-backed securities issued or guaranteed by U.S. government-sponsored enterprises | March 31, 2020
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements		116,852	117,654
Collateralized mortgage obligations issued or guaranteed by U.S. government-sponsored enterprises | March 31, 2020
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	[1],[2]	147,529	118,969
Collateral Pledged [Member] | March 31, 2020
Assets Sold under Agreements to Repurchase [Line Items]
Certificates of Deposit, at Carrying Value		$ 1,000	$ 1,000

[1] (1)Presented within short-term borrowings on the consolidated statements of condition.

[2] (2)All customer repurchase agreements mature continuously or overnight for the dates indicated.