SECURITIES, Contractual Maturity (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Amortized cost of available-for-sale securities by contractual maturity [Abstract]
Due in one year or less	$ 18,208,000
Due after one year through five years	24,682,000
Due after five years through ten years	146,043,000
Due after ten years	14,418,000
Amortized cost	485,704,000		$ 409,267,000
Fair value of available-for-sale securities by contractual maturity [Abstract]
Due in one year or less	18,340,000
Due after one year through five years	25,086,000
Due after five years through ten years	144,781,000
Due after ten years	14,354,000
Fair value	492,464,000		421,190,000
Sale of mortgage-backed securities	25,526,000	$ 0
Realized gain on sale of mortgage-backed securities	1,096,000	$ 0
Mortgage-backed Securities of Government Sponsored Agencies [Member]
Amortized cost of available-for-sale securities by contractual maturity [Abstract]
Without single maturity date	282,353,000
Amortized cost	282,353,000		347,579,000
Fair value of available-for-sale securities by contractual maturity [Abstract]
Without single maturity date	289,903,000
Fair value	289,903,000		$ 357,876,000
Sale of mortgage-backed securities	25,500,000
Realized gain on sale of mortgage-backed securities	$ 1,096,000