MARKETABLE SECURITIES (Tables)

9 Months Ended

Sep. 30, 2021

Investments Debt And Equity Securities [Abstract]

Schedule of Amortized Cost and Fair Value of Securities Available for Sale and Held to Maturity Securities

The following tables summarize the amortized cost and fair value of available for sale and held to maturity securities as of September 30, 2021 and securities available for sale as of December 31, 2020 and the corresponding amounts of gross unrealized gains and losses:

September 30, 2021	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Available for sale:
U.S. government agencies	$	10,013	$	46	$	—	$	10,059
Corporate bonds		34,105		1,233		92		35,246
Mortgage-backed securities		157,846		2,143		847		159,142
Collateralized mortgage obligations		63,272		1,405		54		64,623
Total available for sale	$	265,236	$	4,827	$	993	$	269,070
Held to maturity:
Municipal securities	$	170,634	$	9,139	$	147	$	179,626
Mortgage-backed securities		3,042		—		37		3,005
Total held to maturity	$	173,676	$	9,139	$	184	$	182,631

December 31, 2020	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Available for sale:
Corporate bonds	$	29,608	$	1,382	$	8	$	30,982
Municipal securities		164,668		11,036		—		175,704
Mortgage-backed securities		104,210		3,041		87		107,164
Collateralized mortgage obligations		64,611		2,335		1		66,945
Total available for sale	$	363,097	$	17,794	$	96	$	380,795

Schedule of Securities with Gross Unrealized Losses

Information pertaining to securities with gross unrealized losses as of September 30, 2021 and December 31, 2020, for which no allowance for credit losses has been recorded, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position is detailed in the following tables:

	Less Than 12 Months					12 Months or Longer					Total
September 30, 2021	Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value
Available for sale:
Corporate bonds	$	(92	)	$	7,678	$	—		$	—	$	(92	)	$	7,678
Mortgage-backed securities		(803	)		68,150		(44	)		3,276		(847	)		71,426
Collateralized mortgage obligations		(54	)		18,203		—			—		(54	)		18,203
Total available for sale	$	(949	)	$	94,031	$	(44	)	$	3,276	$	(993	)	$	97,307
Held to maturity:
Municipal securities	$	(147	)	$	4,381	$	—		$	—	$	(147	)	$	4,381
Mortgage-backed securities		(37	)		3,006		—			—		(37	)		3,006
Total held to maturity	$	(184	)	$	7,387	$	—		$	—	$	(184	)	$	7,387

	Less Than 12 Months					12 Months or Longer					Total
December 31, 2020	Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value
Available for sale:
Corporate bonds	$	(8	)	$	2,493	$	—		$	—	$	(8	)	$	2,493
Mortgage-backed securities		(87	)		25,775		—			—		(87	)		25,775
Collateralized mortgage obligations		—			—		(1	)		106		(1	)		106
Total available for sale	$	(95	)	$	28,268	$	(1	)	$	106	$	(96	)	$	28,374

Investments Classified by Contractual Maturity Date

The contractual maturities at September 30, 2021 of available for sale securities at carrying value and estimated fair value are shown below. The Company invests in mortgage-backed securities and collateralized mortgage obligations that have expected maturities that differ from their contractual maturities. These differences arise because borrowers and/or issuers may have the right to call or prepay their obligation with or without call or prepayment penalties.

	Available for Sale				Held to Maturity
September 30, 2021	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due within one year	$	—	$	—	$	4,802	$	4,868
Due after one year through five years		14,645		15,430		48,612		50,466
Due after five years through ten years		29,473		29,875		50,369		53,350
Due after ten years		—		—		66,851		70,942
Mortgage-backed securities		157,846		159,142		3,042		3,005
Collateralized mortgage obligations		63,272		64,623		—		—
Total securities	$	265,236	$	269,070	$	173,676	$	182,631