REPURCHASE AGREEMENTS (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements		$ 241,647	$ 245,868
June 30, 2019
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	[1],[2]	241,647	245,868
Obligations of states and political subdivisions | June 30, 2019
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	[1],[2]	1,700	1,455
Mortgage-backed securities issued or guaranteed by U.S. government-sponsored enterprises | June 30, 2019
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	[1],[2]	116,584	125,590
Collateralized mortgage obligations issued or guaranteed by U.S. government-sponsored enterprises | June 30, 2019
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	[1],[2]	123,363	118,823
Collateral Pledged [Member] | June 30, 2019
Assets Sold under Agreements to Repurchase [Line Items]
Certificates of Deposit, at Carrying Value		$ 1,000	$ 923

[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.