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SECURITIES - Amortized cost and Fair values of securities with maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Amortized Cost
Amortized Cost	$ 584,507	$ 684,087
Fair Value
Fair Value	592,404	679,526
Amortized Cost
Securities held-to-maturity	88,477	121,715
Fair Value
Fair Value	90,529	121,506
Mortgage-backed: Agency residential
Amortized Cost
Amortized Cost	198,184	235,903
Fair Value
Fair Value	200,678	234,303
Amortized Cost
Securities held-to-maturity	19,072	23,192
Fair Value
Fair Value	19,063	22,194
Mortgage-backed: Agency commercial
Amortized Cost
Amortized Cost	133,730	151,878
Fair Value
Fair Value	134,954	150,081
Amortized Cost
Securities held-to-maturity	24,166	25,347
Fair Value
Fair Value	24,887	25,029
Mortgage-backed: Private-label
Amortized Cost
Amortized Cost		254
Fair Value
Fair Value		$ 256
Available-for-sale
Amortized Cost
Due in 1 year or less	49,357
Due after 1 year through 5 years	115,487
Due after 5 years through 10 years	81,515
Due after 10 years	6,234
Amortized Cost	584,507
Fair Value
Due in 1 year or less	49,527
Due after 1 year through 5 years	117,484
Due after 5 years through 10 years	83,392
Due after 10 years	6,369
Fair Value	592,404
Available-for-sale | Mortgage-backed: Agency residential
Amortized Cost
Amortized Cost	198,184
Fair Value
Fair Value	200,678
Available-for-sale | Mortgage-backed: Agency commercial
Amortized Cost
Amortized Cost	133,730
Fair Value
Fair Value	134,954
Held-to-maturity
Amortized Cost
Due in 1 year or less	752
Due after 1 year through 5 years	31,309
Due after 5 years through 10 years	11,504
Due after 10 years	1,674
Securities held-to-maturity	88,477
Fair Value
Due in 1 year or less	758
Due after 1 year through 5 years	32,238
Due after 5 years through 10 years	11,799
Due after 10 years	1,784
Fair Value	90,529
Held-to-maturity | Mortgage-backed: Agency residential
Amortized Cost
Securities held-to-maturity	19,072
Fair Value
Fair Value	19,063
Held-to-maturity | Mortgage-backed: Agency commercial
Amortized Cost
Securities held-to-maturity	24,166
Fair Value
Fair Value	$ 24,887

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-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563

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