SECURITIES - Additional Information (Details)	3 Months Ended
	Mar. 31, 2020 USD ($) security	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($) security
Schedule Of Available-For-Sale And Held-To-Maturity [Line Items]
Available-for-sale, restricted	$ 4,100,000		$ 2,500,000
Gross gains on sales of securities available for sale	0	$ 0
Gross losses on sales of securities available for sale	0	$ 0
Unrealized loss position, fair value	100,515,000		107,929,000
Unrealized loss position, accumulated loss	$ 4,209,000		$ 1,616,000
Number of securities with unrealized losses, held-to-maturity | security	0		0
U.S. government agencies
Schedule Of Available-For-Sale And Held-To-Maturity [Line Items]
Continuous unrealized loss position, number of positions | security	7		6
Unrealized loss position, fair value	$ 8,100,000		$ 5,966,000
Unrealized loss position, accumulated loss	135,000		$ 84,000
Other-than-temporary Impairment Loss, Debt Securities, Available-for-sale	$ 0
U.S. government-sponsored enterprises
Schedule Of Available-For-Sale And Held-To-Maturity [Line Items]
Continuous unrealized loss position, number of positions | security	25		26
Unrealized loss position, fair value	$ 48,584,000		$ 53,249,000
Unrealized loss position, accumulated loss	2,908,000		$ 1,089,000
Other-than-temporary Impairment Loss, Debt Securities, Available-for-sale	$ 0
State and political subdivisions
Schedule Of Available-For-Sale And Held-To-Maturity [Line Items]
Continuous unrealized loss position, number of positions | security	0		14
Unrealized loss position, fair value			$ 17,421,000
Unrealized loss position, accumulated loss			$ 225,000
Mortgage-backed securities - U.S. government-sponsored enterprises
Schedule Of Available-For-Sale And Held-To-Maturity [Line Items]
Continuous unrealized loss position, number of positions | security	15		13
Unrealized loss position, fair value	$ 23,641,000		$ 22,178,000
Unrealized loss position, accumulated loss	377,000		$ 178,000
Other-than-temporary Impairment Loss, Debt Securities, Available-for-sale	$ 0
Mortgage-backed securities - Private mortgage-backed securities
Schedule Of Available-For-Sale And Held-To-Maturity [Line Items]
Continuous unrealized loss position, number of positions | security	5		3
Unrealized loss position, fair value	$ 12,101,000		$ 6,973,000
Unrealized loss position, accumulated loss	357,000		$ 33,000
Other-than-temporary Impairment Loss, Debt Securities, Available-for-sale	$ 0
Corporate debt
Schedule Of Available-For-Sale And Held-To-Maturity [Line Items]
Continuous unrealized loss position, number of positions | security	4		0
Unrealized loss position, fair value	$ 8,089,000		$ 2,142,000
Unrealized loss position, accumulated loss	432,000		$ 7,000
Other-than-temporary Impairment Loss, Debt Securities, Available-for-sale	$ 0
Maturity date term	5 years