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SECURITIES - Summary of Held to Maturity Investment Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Held to maturity:
Amortized Cost	$ 111,307	$ 133,638
Gross Unrealized Gains	4,438	1,731
Gross Unrealized Losses		(342)
Estimated Fair Value	115,745	135,027
State and municipal obligations
Held to maturity:
Amortized Cost	26,926	41,008
Gross Unrealized Gains	1,291	809
Estimated Fair Value	28,217	41,817
U.S. GSE residential mortgage-backed securities
Held to maturity:
Amortized Cost	7,251	8,142
Gross Unrealized Gains	200	5
Gross Unrealized Losses		(54)
Estimated Fair Value	7,451	8,093
U.S. GSE residential collateralized mortgage obligations
Held to maturity:
Amortized Cost	33,800	39,936
Gross Unrealized Gains	1,286	624
Gross Unrealized Losses		(62)
Estimated Fair Value	35,086	40,498
U.S. GSE commercial mortgage-backed securities
Held to maturity:
Amortized Cost	16,871	17,215
Gross Unrealized Gains	704	102
Gross Unrealized Losses		(82)
Estimated Fair Value	17,575	17,235
U.S. GSE commercial collateralized mortgage obligations
Held to maturity:
Amortized Cost	26,459	27,337
Gross Unrealized Gains	957	191
Gross Unrealized Losses		(144)
Estimated Fair Value	$ 27,416	$ 27,384

X

- Definition

Amount of investment in debt security measured at amortized cost (held-to-maturity).

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Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity).

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Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity).

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