SECURITIES, Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Amortized cost of available-for-sale securities by contractual maturity [Abstract]
Due in one year or less	$ 10,662
Due after one year through five years	24,978
Due after five years through ten years	13,323
Due after ten years	6,291
Amortized cost	424,526	$ 386,066
Fair value of available-for-sale securities by contractual maturity [Abstract]
Due in one year or less	10,745
Due after one year through five years	25,574
Due after five years through ten years	13,741
Due after ten years	6,796
Fair value	436,580	390,754
Mortgage-backed Securities of Government Sponsored Agencies [Member]
Amortized cost of available-for-sale securities by contractual maturity [Abstract]
Without single maturity date	369,272
Amortized cost	369,272	338,002
Fair value of available-for-sale securities by contractual maturity [Abstract]
Without single maturity date	379,724
Fair value	$ 379,724	$ 341,953

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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